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Finding the Fourth Proportional to 942.42, 1,403.43 and 886.50

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Solution

The fourth proportional to 942.42, 1,403.43 and 886.50 is: 1,320.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    942.42 : 1,403.43 = 886.50 : x
  2. Step 2: Convert to fraction form
    942.42/1,403.43 = 886.50/x
  3. Step 3: Cross multiply
    942.42x = 1,403.43 × 886.50
  4. Step 4: Simplify right side
    942.42x = 1,244,140.70
  5. Step 5: Solve for x
    x = 1,244,140.70/942.42
  6. Step 6: Final answer
    x = 1,320.16

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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.