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Finding the Fourth Proportional to 904.26, 1,248.87 and 709.26

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Solution

The fourth proportional to 904.26, 1,248.87 and 709.26 is: 979.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.26 : 1,248.87 = 709.26 : x
  2. Step 2: Convert to fraction form
    904.26/1,248.87 = 709.26/x
  3. Step 3: Cross multiply
    904.26x = 1,248.87 × 709.26
  4. Step 4: Simplify right side
    904.26x = 885,767.52
  5. Step 5: Solve for x
    x = 885,767.52/904.26
  6. Step 6: Final answer
    x = 979.55

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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.