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Finding the Fourth Proportional to 1,114.08, 1,537.50 and 672

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Solution

The fourth proportional to 1,114.08, 1,537.50 and 672 is: 927.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,114.08 : 1,537.50 = 672 : x
  2. Step 2: Convert to fraction form
    1,114.08/1,537.50 = 672/x
  3. Step 3: Cross multiply
    1,114.08x = 1,537.50 × 672
  4. Step 4: Simplify right side
    1,114.08x = 1,033,200
  5. Step 5: Solve for x
    x = 1,033,200/1,114.08
  6. Step 6: Final answer
    x = 927.40

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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.