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Finding the Fourth Proportional to 284,272.76, 392,279.50 and 155,185.48

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Solution

The fourth proportional to 284,272.76, 392,279.50 and 155,185.48 is: 214,146.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    284,272.76 : 392,279.50 = 155,185.48 : x
  2. Step 2: Convert to fraction form
    284,272.76/392,279.50 = 155,185.48/x
  3. Step 3: Cross multiply
    284,272.76x = 392,279.50 × 155,185.48
  4. Step 4: Simplify right side
    284,272.76x = 60,876,082,501.66
  5. Step 5: Solve for x
    x = 60,876,082,501.66/284,272.76
  6. Step 6: Final answer
    x = 214,146.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.