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Finding the Fourth Proportional to 647.16, 971.18 and 354.64

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Solution

The fourth proportional to 647.16, 971.18 and 354.64 is: 532.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    647.16 : 971.18 = 354.64 : x
  2. Step 2: Convert to fraction form
    647.16/971.18 = 354.64/x
  3. Step 3: Cross multiply
    647.16x = 971.18 × 354.64
  4. Step 4: Simplify right side
    647.16x = 344,419.28
  5. Step 5: Solve for x
    x = 344,419.28/647.16
  6. Step 6: Final answer
    x = 532.20

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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.