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Finding the Fourth Proportional to 1,649.69, 2,276.17 and 977.52

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Solution

The fourth proportional to 1,649.69, 2,276.17 and 977.52 is: 1,348.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,649.69 : 2,276.17 = 977.52 : x
  2. Step 2: Convert to fraction form
    1,649.69/2,276.17 = 977.52/x
  3. Step 3: Cross multiply
    1,649.69x = 2,276.17 × 977.52
  4. Step 4: Simplify right side
    1,649.69x = 2,225,001.70
  5. Step 5: Solve for x
    x = 2,225,001.70/1,649.69
  6. Step 6: Final answer
    x = 1,348.74

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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.