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Finding the Fourth Proportional to 388,187.34, 535,908.80 and 272,256.83

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Solution

The fourth proportional to 388,187.34, 535,908.80 and 272,256.83 is: 375,861.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,187.34 : 535,908.80 = 272,256.83 : x
  2. Step 2: Convert to fraction form
    388,187.34/535,908.80 = 272,256.83/x
  3. Step 3: Cross multiply
    388,187.34x = 535,908.80 × 272,256.83
  4. Step 4: Simplify right side
    388,187.34x = 145,904,833,077.52
  5. Step 5: Solve for x
    x = 145,904,833,077.52/388,187.34
  6. Step 6: Final answer
    x = 375,861.90

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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.