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Finding the Fourth Proportional to 706.84, 974.72 and 470.72

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Solution

The fourth proportional to 706.84, 974.72 and 470.72 is: 649.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.84 : 974.72 = 470.72 : x
  2. Step 2: Convert to fraction form
    706.84/974.72 = 470.72/x
  3. Step 3: Cross multiply
    706.84x = 974.72 × 470.72
  4. Step 4: Simplify right side
    706.84x = 458,820.20
  5. Step 5: Solve for x
    x = 458,820.20/706.84
  6. Step 6: Final answer
    x = 649.11

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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.