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Finding the Fourth Proportional to 1,347.33, 1,859.46 and 787.71

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Solution

The fourth proportional to 1,347.33, 1,859.46 and 787.71 is: 1,087.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.33 : 1,859.46 = 787.71 : x
  2. Step 2: Convert to fraction form
    1,347.33/1,859.46 = 787.71/x
  3. Step 3: Cross multiply
    1,347.33x = 1,859.46 × 787.71
  4. Step 4: Simplify right side
    1,347.33x = 1,464,715.24
  5. Step 5: Solve for x
    x = 1,464,715.24/1,347.33
  6. Step 6: Final answer
    x = 1,087.12

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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.