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Finding the Fourth Proportional to 932.86, 1,399.29 and 384.90

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Solution

The fourth proportional to 932.86, 1,399.29 and 384.90 is: 577.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.86 : 1,399.29 = 384.90 : x
  2. Step 2: Convert to fraction form
    932.86/1,399.29 = 384.90/x
  3. Step 3: Cross multiply
    932.86x = 1,399.29 × 384.90
  4. Step 4: Simplify right side
    932.86x = 538,579.72
  5. Step 5: Solve for x
    x = 538,579.72/932.86
  6. Step 6: Final answer
    x = 577.34

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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.