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Finding the Fourth Proportional to 261,036.60, 391,554.90 and 257,537.40

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Solution

The fourth proportional to 261,036.60, 391,554.90 and 257,537.40 is: 386,306.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,036.60 : 391,554.90 = 257,537.40 : x
  2. Step 2: Convert to fraction form
    261,036.60/391,554.90 = 257,537.40/x
  3. Step 3: Cross multiply
    261,036.60x = 391,554.90 × 257,537.40
  4. Step 4: Simplify right side
    261,036.60x = 100,840,030,903.26
  5. Step 5: Solve for x
    x = 100,840,030,903.26/261,036.60
  6. Step 6: Final answer
    x = 386,306.10

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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.