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Finding the Fourth Proportional to 602.76, 831.78 and 340.86

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Solution

The fourth proportional to 602.76, 831.78 and 340.86 is: 470.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    602.76 : 831.78 = 340.86 : x
  2. Step 2: Convert to fraction form
    602.76/831.78 = 340.86/x
  3. Step 3: Cross multiply
    602.76x = 831.78 × 340.86
  4. Step 4: Simplify right side
    602.76x = 283,520.53
  5. Step 5: Solve for x
    x = 283,520.53/602.76
  6. Step 6: Final answer
    x = 470.37

Related Problems

Find fourth proportional to 301.38, 415.89 and 170.43
Half scale
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Double scale
Find fourth proportional to 603.76, 833.16 and 341.86
Similar ratio
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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.