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Finding the Fourth Proportional to 816.47, 1,126.90 and 484.87

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Solution

The fourth proportional to 816.47, 1,126.90 and 484.87 is: 669.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.47 : 1,126.90 = 484.87 : x
  2. Step 2: Convert to fraction form
    816.47/1,126.90 = 484.87/x
  3. Step 3: Cross multiply
    816.47x = 1,126.90 × 484.87
  4. Step 4: Simplify right side
    816.47x = 546,400.00
  5. Step 5: Solve for x
    x = 546,400.00/816.47
  6. Step 6: Final answer
    x = 669.22

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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.