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Finding the Fourth Proportional to 521,721.70, 732,509.90 and 521,721.70

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Solution

The fourth proportional to 521,721.70, 732,509.90 and 521,721.70 is: 732,509.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,721.70 : 732,509.90 = 521,721.70 : x
  2. Step 2: Convert to fraction form
    521,721.70/732,509.90 = 521,721.70/x
  3. Step 3: Cross multiply
    521,721.70x = 732,509.90 × 521,721.70
  4. Step 4: Simplify right side
    521,721.70x = 382,166,310,294.83
  5. Step 5: Solve for x
    x = 382,166,310,294.83/521,721.70
  6. Step 6: Final answer
    x = 732,509.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.