Home / 261,014.40-391,521.60-172,440.90

Finding the Fourth Proportional to 261,014.40, 391,521.60 and 172,440.90

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Solution

The fourth proportional to 261,014.40, 391,521.60 and 172,440.90 is: 258,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,014.40 : 391,521.60 = 172,440.90 : x
  2. Step 2: Convert to fraction form
    261,014.40/391,521.60 = 172,440.90/x
  3. Step 3: Cross multiply
    261,014.40x = 391,521.60 × 172,440.90
  4. Step 4: Simplify right side
    261,014.40x = 67,514,337,073.44
  5. Step 5: Solve for x
    x = 67,514,337,073.44/261,014.40
  6. Step 6: Final answer
    x = 258,661.35

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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.