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Finding the Fourth Proportional to 924.39, 1,273.49 and 644.12

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Solution

The fourth proportional to 924.39, 1,273.49 and 644.12 is: 887.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    924.39 : 1,273.49 = 644.12 : x
  2. Step 2: Convert to fraction form
    924.39/1,273.49 = 644.12/x
  3. Step 3: Cross multiply
    924.39x = 1,273.49 × 644.12
  4. Step 4: Simplify right side
    924.39x = 820,277.41
  5. Step 5: Solve for x
    x = 820,277.41/924.39
  6. Step 6: Final answer
    x = 887.37

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1.5x scale

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.