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Finding the Fourth Proportional to 1,423.84, 1,963.12 and 925.76

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Solution

The fourth proportional to 1,423.84, 1,963.12 and 925.76 is: 1,276.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,423.84 : 1,963.12 = 925.76 : x
  2. Step 2: Convert to fraction form
    1,423.84/1,963.12 = 925.76/x
  3. Step 3: Cross multiply
    1,423.84x = 1,963.12 × 925.76
  4. Step 4: Simplify right side
    1,423.84x = 1,817,377.97
  5. Step 5: Solve for x
    x = 1,817,377.97/1,423.84
  6. Step 6: Final answer
    x = 1,276.39

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1.5x scale

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.