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Finding the Fourth Proportional to 929.70, 1,284.27 and 731.04

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Solution

The fourth proportional to 929.70, 1,284.27 and 731.04 is: 1,009.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    929.70 : 1,284.27 = 731.04 : x
  2. Step 2: Convert to fraction form
    929.70/1,284.27 = 731.04/x
  3. Step 3: Cross multiply
    929.70x = 1,284.27 × 731.04
  4. Step 4: Simplify right side
    929.70x = 938,852.74
  5. Step 5: Solve for x
    x = 938,852.74/929.70
  6. Step 6: Final answer
    x = 1,009.84

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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.