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Finding the Fourth Proportional to 438,079.90, 657,119.85 and 105,655.90

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Solution

The fourth proportional to 438,079.90, 657,119.85 and 105,655.90 is: 158,483.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,079.90 : 657,119.85 = 105,655.90 : x
  2. Step 2: Convert to fraction form
    438,079.90/657,119.85 = 105,655.90/x
  3. Step 3: Cross multiply
    438,079.90x = 657,119.85 × 105,655.90
  4. Step 4: Simplify right side
    438,079.90x = 69,428,589,159.62
  5. Step 5: Solve for x
    x = 69,428,589,159.62/438,079.90
  6. Step 6: Final answer
    x = 158,483.85

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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.