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Finding the Fourth Proportional to 1,591.32, 2,386.29 and 551.13

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Solution

The fourth proportional to 1,591.32, 2,386.29 and 551.13 is: 826.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.32 : 2,386.29 = 551.13 : x
  2. Step 2: Convert to fraction form
    1,591.32/2,386.29 = 551.13/x
  3. Step 3: Cross multiply
    1,591.32x = 2,386.29 × 551.13
  4. Step 4: Simplify right side
    1,591.32x = 1,315,156.01
  5. Step 5: Solve for x
    x = 1,315,156.01/1,591.32
  6. Step 6: Final answer
    x = 826.46

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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.