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Finding the Fourth Proportional to 932.50, 1,397.80 and 384.99

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Solution

The fourth proportional to 932.50, 1,397.80 and 384.99 is: 577.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.50 : 1,397.80 = 384.99 : x
  2. Step 2: Convert to fraction form
    932.50/1,397.80 = 384.99/x
  3. Step 3: Cross multiply
    932.50x = 1,397.80 × 384.99
  4. Step 4: Simplify right side
    932.50x = 538,139.02
  5. Step 5: Solve for x
    x = 538,139.02/932.50
  6. Step 6: Final answer
    x = 577.09

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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.