Home / 261,047.10-391,570.65-257,547.90

Finding the Fourth Proportional to 261,047.10, 391,570.65 and 257,547.90

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Solution

The fourth proportional to 261,047.10, 391,570.65 and 257,547.90 is: 386,321.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,047.10 : 391,570.65 = 257,547.90 : x
  2. Step 2: Convert to fraction form
    261,047.10/391,570.65 = 257,547.90/x
  3. Step 3: Cross multiply
    261,047.10x = 391,570.65 × 257,547.90
  4. Step 4: Simplify right side
    261,047.10x = 100,848,198,609.14
  5. Step 5: Solve for x
    x = 100,848,198,609.14/261,047.10
  6. Step 6: Final answer
    x = 386,321.85

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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.