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Finding the Fourth Proportional to 557,142.20, 835,713.30 and 521,712.80

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Solution

The fourth proportional to 557,142.20, 835,713.30 and 521,712.80 is: 782,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,142.20 : 835,713.30 = 521,712.80 : x
  2. Step 2: Convert to fraction form
    557,142.20/835,713.30 = 521,712.80/x
  3. Step 3: Cross multiply
    557,142.20x = 835,713.30 × 521,712.80
  4. Step 4: Simplify right side
    557,142.20x = 436,002,325,740.24
  5. Step 5: Solve for x
    x = 436,002,325,740.24/557,142.20
  6. Step 6: Final answer
    x = 782,569.20

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Double scale
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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.