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Finding the Fourth Proportional to 1,114.59, 1,672.20 and 628.05

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Solution

The fourth proportional to 1,114.59, 1,672.20 and 628.05 is: 942.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.59 : 1,672.20 = 628.05 : x
  2. Step 2: Convert to fraction form
    1,114.59/1,672.20 = 628.05/x
  3. Step 3: Cross multiply
    1,114.59x = 1,672.20 × 628.05
  4. Step 4: Simplify right side
    1,114.59x = 1,050,225.21
  5. Step 5: Solve for x
    x = 1,050,225.21/1,114.59
  6. Step 6: Final answer
    x = 942.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.