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Finding the Fourth Proportional to 858.79, 1,281.90 and 737.83

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Solution

The fourth proportional to 858.79, 1,281.90 and 737.83 is: 1,101.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    858.79 : 1,281.90 = 737.83 : x
  2. Step 2: Convert to fraction form
    858.79/1,281.90 = 737.83/x
  3. Step 3: Cross multiply
    858.79x = 1,281.90 × 737.83
  4. Step 4: Simplify right side
    858.79x = 945,824.28
  5. Step 5: Solve for x
    x = 945,824.28/858.79
  6. Step 6: Final answer
    x = 1,101.35

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.