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Finding the Fourth Proportional to 904.55, 1,248.27 and 490.55

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Solution

The fourth proportional to 904.55, 1,248.27 and 490.55 is: 676.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.55 : 1,248.27 = 490.55 : x
  2. Step 2: Convert to fraction form
    904.55/1,248.27 = 490.55/x
  3. Step 3: Cross multiply
    904.55x = 1,248.27 × 490.55
  4. Step 4: Simplify right side
    904.55x = 612,332.61
  5. Step 5: Solve for x
    x = 612,332.61/904.55
  6. Step 6: Final answer
    x = 676.95

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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.