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Finding the Fourth Proportional to 602.78, 831.47 and 453.60

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Solution

The fourth proportional to 602.78, 831.47 and 453.60 is: 625.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.78 : 831.47 = 453.60 : x
  2. Step 2: Convert to fraction form
    602.78/831.47 = 453.60/x
  3. Step 3: Cross multiply
    602.78x = 831.47 × 453.60
  4. Step 4: Simplify right side
    602.78x = 377,152.52
  5. Step 5: Solve for x
    x = 377,152.52/602.78
  6. Step 6: Final answer
    x = 625.69

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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.