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Finding the Fourth Proportional to 1,472.78, 2,209.95 and 651.62

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Solution

The fourth proportional to 1,472.78, 2,209.95 and 651.62 is: 977.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,472.78 : 2,209.95 = 651.62 : x
  2. Step 2: Convert to fraction form
    1,472.78/2,209.95 = 651.62/x
  3. Step 3: Cross multiply
    1,472.78x = 2,209.95 × 651.62
  4. Step 4: Simplify right side
    1,472.78x = 1,440,047.62
  5. Step 5: Solve for x
    x = 1,440,047.62/1,472.78
  6. Step 6: Final answer
    x = 977.78

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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.