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Finding the Fourth Proportional to 472.60, 708.90 and 400.60

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Solution

The fourth proportional to 472.60, 708.90 and 400.60 is: 600.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.60 : 708.90 = 400.60 : x
  2. Step 2: Convert to fraction form
    472.60/708.90 = 400.60/x
  3. Step 3: Cross multiply
    472.60x = 708.90 × 400.60
  4. Step 4: Simplify right side
    472.60x = 283,985.34
  5. Step 5: Solve for x
    x = 283,985.34/472.60
  6. Step 6: Final answer
    x = 600.90

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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.