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Finding the Fourth Proportional to 529,695.50, 730,979.79 and 291,231.50

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Solution

The fourth proportional to 529,695.50, 730,979.79 and 291,231.50 is: 401,899.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,695.50 : 730,979.79 = 291,231.50 : x
  2. Step 2: Convert to fraction form
    529,695.50/730,979.79 = 291,231.50/x
  3. Step 3: Cross multiply
    529,695.50x = 730,979.79 × 291,231.50
  4. Step 4: Simplify right side
    529,695.50x = 212,884,340,711.39
  5. Step 5: Solve for x
    x = 212,884,340,711.39/529,695.50
  6. Step 6: Final answer
    x = 401,899.47

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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.