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Finding the Fourth Proportional to 637.38, 948.47 and 612.77

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Solution

The fourth proportional to 637.38, 948.47 and 612.77 is: 911.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.38 : 948.47 = 612.77 : x
  2. Step 2: Convert to fraction form
    637.38/948.47 = 612.77/x
  3. Step 3: Cross multiply
    637.38x = 948.47 × 612.77
  4. Step 4: Simplify right side
    637.38x = 581,186.16
  5. Step 5: Solve for x
    x = 581,186.16/637.38
  6. Step 6: Final answer
    x = 911.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.