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Finding the Fourth Proportional to 579,381.70, 869,072.55 and 411,420.10

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Solution

The fourth proportional to 579,381.70, 869,072.55 and 411,420.10 is: 617,130.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,381.70 : 869,072.55 = 411,420.10 : x
  2. Step 2: Convert to fraction form
    579,381.70/869,072.55 = 411,420.10/x
  3. Step 3: Cross multiply
    579,381.70x = 869,072.55 × 411,420.10
  4. Step 4: Simplify right side
    579,381.70x = 357,553,915,428.26
  5. Step 5: Solve for x
    x = 357,553,915,428.26/579,381.70
  6. Step 6: Final answer
    x = 617,130.15

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Double scale
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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.