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Finding the Fourth Proportional to 261,671.60, 391,729.80 and 173,025.20

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Solution

The fourth proportional to 261,671.60, 391,729.80 and 173,025.20 is: 259,023.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,671.60 : 391,729.80 = 173,025.20 : x
  2. Step 2: Convert to fraction form
    261,671.60/391,729.80 = 173,025.20/x
  3. Step 3: Cross multiply
    261,671.60x = 391,729.80 × 173,025.20
  4. Step 4: Simplify right side
    261,671.60x = 67,779,126,990.96
  5. Step 5: Solve for x
    x = 67,779,126,990.96/261,671.60
  6. Step 6: Final answer
    x = 259,023.63

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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.