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Finding the Fourth Proportional to 903.60, 1,247.38 and 588.79

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Solution

The fourth proportional to 903.60, 1,247.38 and 588.79 is: 812.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.60 : 1,247.38 = 588.79 : x
  2. Step 2: Convert to fraction form
    903.60/1,247.38 = 588.79/x
  3. Step 3: Cross multiply
    903.60x = 1,247.38 × 588.79
  4. Step 4: Simplify right side
    903.60x = 734,444.96
  5. Step 5: Solve for x
    x = 734,444.96/903.60
  6. Step 6: Final answer
    x = 812.80

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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.