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Finding the Fourth Proportional to 579,783.80, 869,675.70 and 411,822.20

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Solution

The fourth proportional to 579,783.80, 869,675.70 and 411,822.20 is: 617,733.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,783.80 : 869,675.70 = 411,822.20 : x
  2. Step 2: Convert to fraction form
    579,783.80/869,675.70 = 411,822.20/x
  3. Step 3: Cross multiply
    579,783.80x = 869,675.70 × 411,822.20
  4. Step 4: Simplify right side
    579,783.80x = 358,151,760,060.54
  5. Step 5: Solve for x
    x = 358,151,760,060.54/579,783.80
  6. Step 6: Final answer
    x = 617,733.30

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Half scale
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Double scale
Find fourth proportional to 579,784.80, 869,677.20 and 411,823.20
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.