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Finding the Fourth Proportional to 902.47, 1,245.40 and 488.47

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Solution

The fourth proportional to 902.47, 1,245.40 and 488.47 is: 674.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.47 : 1,245.40 = 488.47 : x
  2. Step 2: Convert to fraction form
    902.47/1,245.40 = 488.47/x
  3. Step 3: Cross multiply
    902.47x = 1,245.40 × 488.47
  4. Step 4: Simplify right side
    902.47x = 608,340.54
  5. Step 5: Solve for x
    x = 608,340.54/902.47
  6. Step 6: Final answer
    x = 674.08

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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.