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Finding the Fourth Proportional to 951.42, 1,420.53 and 942.05

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Solution

The fourth proportional to 951.42, 1,420.53 and 942.05 is: 1,406.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.42 : 1,420.53 = 942.05 : x
  2. Step 2: Convert to fraction form
    951.42/1,420.53 = 942.05/x
  3. Step 3: Cross multiply
    951.42x = 1,420.53 × 942.05
  4. Step 4: Simplify right side
    951.42x = 1,338,215.60
  5. Step 5: Solve for x
    x = 1,338,215.60/951.42
  6. Step 6: Final answer
    x = 1,406.55

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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.