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Finding the Fourth Proportional to 521,062.34, 719,078.79 and 291,617.82

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Solution

The fourth proportional to 521,062.34, 719,078.79 and 291,617.82 is: 402,439.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,062.34 : 719,078.79 = 291,617.82 : x
  2. Step 2: Convert to fraction form
    521,062.34/719,078.79 = 291,617.82/x
  3. Step 3: Cross multiply
    521,062.34x = 719,078.79 × 291,617.82
  4. Step 4: Simplify right side
    521,062.34x = 209,696,189,148.04
  5. Step 5: Solve for x
    x = 209,696,189,148.04/521,062.34
  6. Step 6: Final answer
    x = 402,439.74

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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.