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Finding the Fourth Proportional to 714.38, 985.58 and 528.32

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Solution

The fourth proportional to 714.38, 985.58 and 528.32 is: 728.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.38 : 985.58 = 528.32 : x
  2. Step 2: Convert to fraction form
    714.38/985.58 = 528.32/x
  3. Step 3: Cross multiply
    714.38x = 985.58 × 528.32
  4. Step 4: Simplify right side
    714.38x = 520,701.63
  5. Step 5: Solve for x
    x = 520,701.63/714.38
  6. Step 6: Final answer
    x = 728.89

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Double scale
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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.