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Finding the Fourth Proportional to 708.86, 977.92 and 472.58

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Solution

The fourth proportional to 708.86, 977.92 and 472.58 is: 651.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.86 : 977.92 = 472.58 : x
  2. Step 2: Convert to fraction form
    708.86/977.92 = 472.58/x
  3. Step 3: Cross multiply
    708.86x = 977.92 × 472.58
  4. Step 4: Simplify right side
    708.86x = 462,146.70
  5. Step 5: Solve for x
    x = 462,146.70/708.86
  6. Step 6: Final answer
    x = 651.96

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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.