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Finding the Fourth Proportional to 438,070.06, 657,169.49 and 138,482.65

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Solution

The fourth proportional to 438,070.06, 657,169.49 and 138,482.65 is: 207,744.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,070.06 : 657,169.49 = 138,482.65 : x
  2. Step 2: Convert to fraction form
    438,070.06/657,169.49 = 138,482.65/x
  3. Step 3: Cross multiply
    438,070.06x = 657,169.49 × 138,482.65
  4. Step 4: Simplify right side
    438,070.06x = 91,006,572,474.35
  5. Step 5: Solve for x
    x = 91,006,572,474.35/438,070.06
  6. Step 6: Final answer
    x = 207,744.33

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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.