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Finding the Fourth Proportional to 1,047.86, 1,445.08 and 674.18

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Solution

The fourth proportional to 1,047.86, 1,445.08 and 674.18 is: 929.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,047.86 : 1,445.08 = 674.18 : x
  2. Step 2: Convert to fraction form
    1,047.86/1,445.08 = 674.18/x
  3. Step 3: Cross multiply
    1,047.86x = 1,445.08 × 674.18
  4. Step 4: Simplify right side
    1,047.86x = 974,244.03
  5. Step 5: Solve for x
    x = 974,244.03/1,047.86
  6. Step 6: Final answer
    x = 929.75

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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.