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Finding the Fourth Proportional to 438,079.40, 657,119.10 and 105,655.40

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Solution

The fourth proportional to 438,079.40, 657,119.10 and 105,655.40 is: 158,483.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,079.40 : 657,119.10 = 105,655.40 : x
  2. Step 2: Convert to fraction form
    438,079.40/657,119.10 = 105,655.40/x
  3. Step 3: Cross multiply
    438,079.40x = 657,119.10 × 105,655.40
  4. Step 4: Simplify right side
    438,079.40x = 69,428,181,358.14
  5. Step 5: Solve for x
    x = 69,428,181,358.14/438,079.40
  6. Step 6: Final answer
    x = 158,483.10

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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.