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Finding the Fourth Proportional to 442,957.40, 664,349.70 and 143,365.40

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Solution

The fourth proportional to 442,957.40, 664,349.70 and 143,365.40 is: 215,020.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,957.40 : 664,349.70 = 143,365.40 : x
  2. Step 2: Convert to fraction form
    442,957.40/664,349.70 = 143,365.40/x
  3. Step 3: Cross multiply
    442,957.40x = 664,349.70 × 143,365.40
  4. Step 4: Simplify right side
    442,957.40x = 95,244,760,480.38
  5. Step 5: Solve for x
    x = 95,244,760,480.38/442,957.40
  6. Step 6: Final answer
    x = 215,020.14

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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.