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Finding the Fourth Proportional to 714.42, 986.04 and 529.20

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Solution

The fourth proportional to 714.42, 986.04 and 529.20 is: 730.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.42 : 986.04 = 529.20 : x
  2. Step 2: Convert to fraction form
    714.42/986.04 = 529.20/x
  3. Step 3: Cross multiply
    714.42x = 986.04 × 529.20
  4. Step 4: Simplify right side
    714.42x = 521,812.37
  5. Step 5: Solve for x
    x = 521,812.37/714.42
  6. Step 6: Final answer
    x = 730.40

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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.