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Finding the Fourth Proportional to 833.71, 1,247.38 and 503.43

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Solution

The fourth proportional to 833.71, 1,247.38 and 503.43 is: 753.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.71 : 1,247.38 = 503.43 : x
  2. Step 2: Convert to fraction form
    833.71/1,247.38 = 503.43/x
  3. Step 3: Cross multiply
    833.71x = 1,247.38 × 503.43
  4. Step 4: Simplify right side
    833.71x = 627,968.51
  5. Step 5: Solve for x
    x = 627,968.51/833.71
  6. Step 6: Final answer
    x = 753.22

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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.