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Finding the Fourth Proportional to 904.68, 1,245.06 and 717.57

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Solution

The fourth proportional to 904.68, 1,245.06 and 717.57 is: 987.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.68 : 1,245.06 = 717.57 : x
  2. Step 2: Convert to fraction form
    904.68/1,245.06 = 717.57/x
  3. Step 3: Cross multiply
    904.68x = 1,245.06 × 717.57
  4. Step 4: Simplify right side
    904.68x = 893,417.70
  5. Step 5: Solve for x
    x = 893,417.70/904.68
  6. Step 6: Final answer
    x = 987.55

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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.