Home / 579,427.20-869,140.80-509,443.20

Finding the Fourth Proportional to 579,427.20, 869,140.80 and 509,443.20

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Solution

The fourth proportional to 579,427.20, 869,140.80 and 509,443.20 is: 764,164.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,427.20 : 869,140.80 = 509,443.20 : x
  2. Step 2: Convert to fraction form
    579,427.20/869,140.80 = 509,443.20/x
  3. Step 3: Cross multiply
    579,427.20x = 869,140.80 × 509,443.20
  4. Step 4: Simplify right side
    579,427.20x = 442,777,870,402.56
  5. Step 5: Solve for x
    x = 442,777,870,402.56/579,427.20
  6. Step 6: Final answer
    x = 764,164.80

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Half scale
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Double scale
Find fourth proportional to 579,428.20, 869,142.30 and 509,444.20
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.