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Finding the Fourth Proportional to 789.16, 1,088.96 and 457.52

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Solution

The fourth proportional to 789.16, 1,088.96 and 457.52 is: 631.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.16 : 1,088.96 = 457.52 : x
  2. Step 2: Convert to fraction form
    789.16/1,088.96 = 457.52/x
  3. Step 3: Cross multiply
    789.16x = 1,088.96 × 457.52
  4. Step 4: Simplify right side
    789.16x = 498,218.69
  5. Step 5: Solve for x
    x = 498,218.69/789.16
  6. Step 6: Final answer
    x = 631.33

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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.