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Finding the Fourth Proportional to 559,440.68, 772,001.28 and 317,691.32

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Solution

The fourth proportional to 559,440.68, 772,001.28 and 317,691.32 is: 438,398.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,440.68 : 772,001.28 = 317,691.32 : x
  2. Step 2: Convert to fraction form
    559,440.68/772,001.28 = 317,691.32/x
  3. Step 3: Cross multiply
    559,440.68x = 772,001.28 × 317,691.32
  4. Step 4: Simplify right side
    559,440.68x = 245,258,101,824.88
  5. Step 5: Solve for x
    x = 245,258,101,824.88/559,440.68
  6. Step 6: Final answer
    x = 438,398.77

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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.