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Finding the Fourth Proportional to 1,348.71, 1,860.07 and 817.47

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Solution

The fourth proportional to 1,348.71, 1,860.07 and 817.47 is: 1,127.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,348.71 : 1,860.07 = 817.47 : x
  2. Step 2: Convert to fraction form
    1,348.71/1,860.07 = 817.47/x
  3. Step 3: Cross multiply
    1,348.71x = 1,860.07 × 817.47
  4. Step 4: Simplify right side
    1,348.71x = 1,520,551.42
  5. Step 5: Solve for x
    x = 1,520,551.42/1,348.71
  6. Step 6: Final answer
    x = 1,127.41

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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.