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Finding the Fourth Proportional to 929.14, 1,393.88 and 467.15

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Solution

The fourth proportional to 929.14, 1,393.88 and 467.15 is: 700.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.14 : 1,393.88 = 467.15 : x
  2. Step 2: Convert to fraction form
    929.14/1,393.88 = 467.15/x
  3. Step 3: Cross multiply
    929.14x = 1,393.88 × 467.15
  4. Step 4: Simplify right side
    929.14x = 651,141.74
  5. Step 5: Solve for x
    x = 651,141.74/929.14
  6. Step 6: Final answer
    x = 700.80

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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.