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Finding the Fourth Proportional to 602.75, 831.80 and 340.78

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Solution

The fourth proportional to 602.75, 831.80 and 340.78 is: 470.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.75 : 831.80 = 340.78 : x
  2. Step 2: Convert to fraction form
    602.75/831.80 = 340.78/x
  3. Step 3: Cross multiply
    602.75x = 831.80 × 340.78
  4. Step 4: Simplify right side
    602.75x = 283,460.80
  5. Step 5: Solve for x
    x = 283,460.80/602.75
  6. Step 6: Final answer
    x = 470.28

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Find fourth proportional to 301.38, 415.90 and 170.39
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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.