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Finding the Fourth Proportional to 438,380.91, 657,760.80 and 235,740.16

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Solution

The fourth proportional to 438,380.91, 657,760.80 and 235,740.16 is: 353,712.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,380.91 : 657,760.80 = 235,740.16 : x
  2. Step 2: Convert to fraction form
    438,380.91/657,760.80 = 235,740.16/x
  3. Step 3: Cross multiply
    438,380.91x = 657,760.80 × 235,740.16
  4. Step 4: Simplify right side
    438,380.91x = 155,060,637,939.96
  5. Step 5: Solve for x
    x = 155,060,637,939.96/438,380.91
  6. Step 6: Final answer
    x = 353,712.11

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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.