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Finding the Fourth Proportional to 377,423.40, 521,037.17 and 291,188.77

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Solution

The fourth proportional to 377,423.40, 521,037.17 and 291,188.77 is: 401,989.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,423.40 : 521,037.17 = 291,188.77 : x
  2. Step 2: Convert to fraction form
    377,423.40/521,037.17 = 291,188.77/x
  3. Step 3: Cross multiply
    377,423.40x = 521,037.17 × 291,188.77
  4. Step 4: Simplify right side
    377,423.40x = 151,720,172,656.58
  5. Step 5: Solve for x
    x = 151,720,172,656.58/377,423.40
  6. Step 6: Final answer
    x = 401,989.31

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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.