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Finding the Fourth Proportional to 579,443.80, 869,165.70 and 509,402.20

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Solution

The fourth proportional to 579,443.80, 869,165.70 and 509,402.20 is: 764,103.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,443.80 : 869,165.70 = 509,402.20 : x
  2. Step 2: Convert to fraction form
    579,443.80/869,165.70 = 509,402.20/x
  3. Step 3: Cross multiply
    579,443.80x = 869,165.70 × 509,402.20
  4. Step 4: Simplify right side
    579,443.80x = 442,754,919,744.54
  5. Step 5: Solve for x
    x = 442,754,919,744.54/579,443.80
  6. Step 6: Final answer
    x = 764,103.30

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Half scale
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Double scale
Find fourth proportional to 579,444.80, 869,167.20 and 509,403.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.