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Finding the Fourth Proportional to 714.42, 1,070.42 and 484.79

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Solution

The fourth proportional to 714.42, 1,070.42 and 484.79 is: 726.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.42 : 1,070.42 = 484.79 : x
  2. Step 2: Convert to fraction form
    714.42/1,070.42 = 484.79/x
  3. Step 3: Cross multiply
    714.42x = 1,070.42 × 484.79
  4. Step 4: Simplify right side
    714.42x = 518,921.14
  5. Step 5: Solve for x
    x = 518,921.14/714.42
  6. Step 6: Final answer
    x = 726.35

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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.