Home / 261,126.79-391,690.19-172,359.53

Finding the Fourth Proportional to 261,126.79, 391,690.19 and 172,359.53

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Solution

The fourth proportional to 261,126.79, 391,690.19 and 172,359.53 is: 258,539.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,126.79 : 391,690.19 = 172,359.53 : x
  2. Step 2: Convert to fraction form
    261,126.79/391,690.19 = 172,359.53/x
  3. Step 3: Cross multiply
    261,126.79x = 391,690.19 × 172,359.53
  4. Step 4: Simplify right side
    261,126.79x = 67,511,537,054.01
  5. Step 5: Solve for x
    x = 67,511,537,054.01/261,126.79
  6. Step 6: Final answer
    x = 258,539.30

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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.