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Finding the Fourth Proportional to 900.75, 1,243.44 and 602.49

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Solution

The fourth proportional to 900.75, 1,243.44 and 602.49 is: 831.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    900.75 : 1,243.44 = 602.49 : x
  2. Step 2: Convert to fraction form
    900.75/1,243.44 = 602.49/x
  3. Step 3: Cross multiply
    900.75x = 1,243.44 × 602.49
  4. Step 4: Simplify right side
    900.75x = 749,160.17
  5. Step 5: Solve for x
    x = 749,160.17/900.75
  6. Step 6: Final answer
    x = 831.71

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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.