Home / 261,036.10-391,554.15-257,536.90

Finding the Fourth Proportional to 261,036.10, 391,554.15 and 257,536.90

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Solution

The fourth proportional to 261,036.10, 391,554.15 and 257,536.90 is: 386,305.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,036.10 : 391,554.15 = 257,536.90 : x
  2. Step 2: Convert to fraction form
    261,036.10/391,554.15 = 257,536.90/x
  3. Step 3: Cross multiply
    261,036.10x = 391,554.15 × 257,536.90
  4. Step 4: Simplify right side
    261,036.10x = 100,839,641,973.14
  5. Step 5: Solve for x
    x = 100,839,641,973.14/261,036.10
  6. Step 6: Final answer
    x = 386,305.35

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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.