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Finding the Fourth Proportional to 438,429.80, 657,644.70 and 157,956.20

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Solution

The fourth proportional to 438,429.80, 657,644.70 and 157,956.20 is: 236,934.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,429.80 : 657,644.70 = 157,956.20 : x
  2. Step 2: Convert to fraction form
    438,429.80/657,644.70 = 157,956.20/x
  3. Step 3: Cross multiply
    438,429.80x = 657,644.70 × 157,956.20
  4. Step 4: Simplify right side
    438,429.80x = 103,879,057,762.14
  5. Step 5: Solve for x
    x = 103,879,057,762.14/438,429.80
  6. Step 6: Final answer
    x = 236,934.30

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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.