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Finding the Fourth Proportional to 983.47, 1,473.95 and 521.46

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Solution

The fourth proportional to 983.47, 1,473.95 and 521.46 is: 781.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    983.47 : 1,473.95 = 521.46 : x
  2. Step 2: Convert to fraction form
    983.47/1,473.95 = 521.46/x
  3. Step 3: Cross multiply
    983.47x = 1,473.95 × 521.46
  4. Step 4: Simplify right side
    983.47x = 768,608.48
  5. Step 5: Solve for x
    x = 768,608.48/983.47
  6. Step 6: Final answer
    x = 781.53

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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.