Home / 521,971.31-720,308.16-307,125.29

Finding the Fourth Proportional to 521,971.31, 720,308.16 and 307,125.29

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Solution

The fourth proportional to 521,971.31, 720,308.16 and 307,125.29 is: 423,825.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,971.31 : 720,308.16 = 307,125.29 : x
  2. Step 2: Convert to fraction form
    521,971.31/720,308.16 = 307,125.29/x
  3. Step 3: Cross multiply
    521,971.31x = 720,308.16 × 307,125.29
  4. Step 4: Simplify right side
    521,971.31x = 221,224,854,330.14
  5. Step 5: Solve for x
    x = 221,224,854,330.14/521,971.31
  6. Step 6: Final answer
    x = 423,825.70

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.