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Finding the Fourth Proportional to 453,987.40, 680,908.20 and 138,370.90

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Solution

The fourth proportional to 453,987.40, 680,908.20 and 138,370.90 is: 207,534.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,987.40 : 680,908.20 = 138,370.90 : x
  2. Step 2: Convert to fraction form
    453,987.40/680,908.20 = 138,370.90/x
  3. Step 3: Cross multiply
    453,987.40x = 680,908.20 × 138,370.90
  4. Step 4: Simplify right side
    453,987.40x = 94,217,880,451.38
  5. Step 5: Solve for x
    x = 94,217,880,451.38/453,987.40
  6. Step 6: Final answer
    x = 207,534.13

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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.