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Finding the Fourth Proportional to 643,287.29, 965,071.26 and 243,931.97

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Solution

The fourth proportional to 643,287.29, 965,071.26 and 243,931.97 is: 365,951.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,287.29 : 965,071.26 = 243,931.97 : x
  2. Step 2: Convert to fraction form
    643,287.29/965,071.26 = 243,931.97/x
  3. Step 3: Cross multiply
    643,287.29x = 965,071.26 × 243,931.97
  4. Step 4: Simplify right side
    643,287.29x = 235,411,736,054.86
  5. Step 5: Solve for x
    x = 235,411,736,054.86/643,287.29
  6. Step 6: Final answer
    x = 365,951.17

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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.