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Finding the Fourth Proportional to 272,279.80, 408,225.30 and 153,987.40

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Solution

The fourth proportional to 272,279.80, 408,225.30 and 153,987.40 is: 230,871.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,279.80 : 408,225.30 = 153,987.40 : x
  2. Step 2: Convert to fraction form
    272,279.80/408,225.30 = 153,987.40/x
  3. Step 3: Cross multiply
    272,279.80x = 408,225.30 × 153,987.40
  4. Step 4: Simplify right side
    272,279.80x = 62,861,552,561.22
  5. Step 5: Solve for x
    x = 62,861,552,561.22/272,279.80
  6. Step 6: Final answer
    x = 230,871.16

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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.