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Finding the Fourth Proportional to 1,672.86, 2,307.40 and 974.24

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Solution

The fourth proportional to 1,672.86, 2,307.40 and 974.24 is: 1,343.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,672.86 : 2,307.40 = 974.24 : x
  2. Step 2: Convert to fraction form
    1,672.86/2,307.40 = 974.24/x
  3. Step 3: Cross multiply
    1,672.86x = 2,307.40 × 974.24
  4. Step 4: Simplify right side
    1,672.86x = 2,247,949.84
  5. Step 5: Solve for x
    x = 2,247,949.84/1,672.86
  6. Step 6: Final answer
    x = 1,343.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.