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Finding the Fourth Proportional to 1,045.66, 1,442.16 and 672.64

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Solution

The fourth proportional to 1,045.66, 1,442.16 and 672.64 is: 927.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.66 : 1,442.16 = 672.64 : x
  2. Step 2: Convert to fraction form
    1,045.66/1,442.16 = 672.64/x
  3. Step 3: Cross multiply
    1,045.66x = 1,442.16 × 672.64
  4. Step 4: Simplify right side
    1,045.66x = 970,054.50
  5. Step 5: Solve for x
    x = 970,054.50/1,045.66
  6. Step 6: Final answer
    x = 927.70

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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.