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Finding the Fourth Proportional to 904.77, 1,248.31 and 550.40

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Solution

The fourth proportional to 904.77, 1,248.31 and 550.40 is: 759.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    904.77 : 1,248.31 = 550.40 : x
  2. Step 2: Convert to fraction form
    904.77/1,248.31 = 550.40/x
  3. Step 3: Cross multiply
    904.77x = 1,248.31 × 550.40
  4. Step 4: Simplify right side
    904.77x = 687,064.27
  5. Step 5: Solve for x
    x = 687,064.27/904.77
  6. Step 6: Final answer
    x = 759.38

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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.