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Finding the Fourth Proportional to 1,434.97, 2,153.07 and 784.95

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Solution

The fourth proportional to 1,434.97, 2,153.07 and 784.95 is: 1,177.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,434.97 : 2,153.07 = 784.95 : x
  2. Step 2: Convert to fraction form
    1,434.97/2,153.07 = 784.95/x
  3. Step 3: Cross multiply
    1,434.97x = 2,153.07 × 784.95
  4. Step 4: Simplify right side
    1,434.97x = 1,690,044.22
  5. Step 5: Solve for x
    x = 1,690,044.22/1,434.97
  6. Step 6: Final answer
    x = 1,177.75

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1.5x scale

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.