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Finding the Fourth Proportional to 372,129.40, 558,194.10 and 266,721.40

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Solution

The fourth proportional to 372,129.40, 558,194.10 and 266,721.40 is: 400,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    372,129.40 : 558,194.10 = 266,721.40 : x
  2. Step 2: Convert to fraction form
    372,129.40/558,194.10 = 266,721.40/x
  3. Step 3: Cross multiply
    372,129.40x = 558,194.10 × 266,721.40
  4. Step 4: Simplify right side
    372,129.40x = 148,882,311,823.74
  5. Step 5: Solve for x
    x = 148,882,311,823.74/372,129.40
  6. Step 6: Final answer
    x = 400,082.10

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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.