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Finding the Fourth Proportional to 904.75, 1,248.05 and 572.60

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Solution

The fourth proportional to 904.75, 1,248.05 and 572.60 is: 789.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.75 : 1,248.05 = 572.60 : x
  2. Step 2: Convert to fraction form
    904.75/1,248.05 = 572.60/x
  3. Step 3: Cross multiply
    904.75x = 1,248.05 × 572.60
  4. Step 4: Simplify right side
    904.75x = 714,633.43
  5. Step 5: Solve for x
    x = 714,633.43/904.75
  6. Step 6: Final answer
    x = 789.87

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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.