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Finding the Fourth Proportional to 949.89, 1,423.31 and 583.91

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Solution

The fourth proportional to 949.89, 1,423.31 and 583.91 is: 874.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    949.89 : 1,423.31 = 583.91 : x
  2. Step 2: Convert to fraction form
    949.89/1,423.31 = 583.91/x
  3. Step 3: Cross multiply
    949.89x = 1,423.31 × 583.91
  4. Step 4: Simplify right side
    949.89x = 831,080.24
  5. Step 5: Solve for x
    x = 831,080.24/949.89
  6. Step 6: Final answer
    x = 874.92

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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.