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Finding the Fourth Proportional to 1,648.64, 2,276.16 and 1,237.76

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Solution

The fourth proportional to 1,648.64, 2,276.16 and 1,237.76 is: 1,708.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,648.64 : 2,276.16 = 1,237.76 : x
  2. Step 2: Convert to fraction form
    1,648.64/2,276.16 = 1,237.76/x
  3. Step 3: Cross multiply
    1,648.64x = 2,276.16 × 1,237.76
  4. Step 4: Simplify right side
    1,648.64x = 2,817,339.80
  5. Step 5: Solve for x
    x = 2,817,339.80/1,648.64
  6. Step 6: Final answer
    x = 1,708.89

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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.