Home / 820,931.70-1,231,397.55-521,750.10

Finding the Fourth Proportional to 820,931.70, 1,231,397.55 and 521,750.10

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Solution

The fourth proportional to 820,931.70, 1,231,397.55 and 521,750.10 is: 782,625.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,931.70 : 1,231,397.55 = 521,750.10 : x
  2. Step 2: Convert to fraction form
    820,931.70/1,231,397.55 = 521,750.10/x
  3. Step 3: Cross multiply
    820,931.70x = 1,231,397.55 × 521,750.10
  4. Step 4: Simplify right side
    820,931.70x = 642,481,794,852.26
  5. Step 5: Solve for x
    x = 642,481,794,852.26/820,931.70
  6. Step 6: Final answer
    x = 782,625.15

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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.