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Finding the Fourth Proportional to 260,831.60, 391,392.76 and 140,886.12

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Solution

The fourth proportional to 260,831.60, 391,392.76 and 140,886.12 is: 211,407.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,831.60 : 391,392.76 = 140,886.12 : x
  2. Step 2: Convert to fraction form
    260,831.60/391,392.76 = 140,886.12/x
  3. Step 3: Cross multiply
    260,831.60x = 391,392.76 × 140,886.12
  4. Step 4: Simplify right side
    260,831.60x = 55,141,807,352.49
  5. Step 5: Solve for x
    x = 55,141,807,352.49/260,831.60
  6. Step 6: Final answer
    x = 211,407.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.