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Finding the Fourth Proportional to 388,090.44, 535,421.15 and 387,491.92

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Solution

The fourth proportional to 388,090.44, 535,421.15 and 387,491.92 is: 534,595.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,090.44 : 535,421.15 = 387,491.92 : x
  2. Step 2: Convert to fraction form
    388,090.44/535,421.15 = 387,491.92/x
  3. Step 3: Cross multiply
    388,090.44x = 535,421.15 × 387,491.92
  4. Step 4: Simplify right side
    388,090.44x = 207,471,369,778.83
  5. Step 5: Solve for x
    x = 207,471,369,778.83/388,090.44
  6. Step 6: Final answer
    x = 534,595.41

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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.