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Finding the Fourth Proportional to 672.84, 1,009.26 and 307.53

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Solution

The fourth proportional to 672.84, 1,009.26 and 307.53 is: 461.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.84 : 1,009.26 = 307.53 : x
  2. Step 2: Convert to fraction form
    672.84/1,009.26 = 307.53/x
  3. Step 3: Cross multiply
    672.84x = 1,009.26 × 307.53
  4. Step 4: Simplify right side
    672.84x = 310,377.73
  5. Step 5: Solve for x
    x = 310,377.73/672.84
  6. Step 6: Final answer
    x = 461.30

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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.