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Finding the Fourth Proportional to 903.49, 1,245.60 and 717.59

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Solution

The fourth proportional to 903.49, 1,245.60 and 717.59 is: 989.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.49 : 1,245.60 = 717.59 : x
  2. Step 2: Convert to fraction form
    903.49/1,245.60 = 717.59/x
  3. Step 3: Cross multiply
    903.49x = 1,245.60 × 717.59
  4. Step 4: Simplify right side
    903.49x = 893,833.22
  5. Step 5: Solve for x
    x = 893,833.22/903.49
  6. Step 6: Final answer
    x = 989.31

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Double scale
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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.