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Finding the Fourth Proportional to 391,249.88, 539,927.08 and 230,111.72

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Solution

The fourth proportional to 391,249.88, 539,927.08 and 230,111.72 is: 317,555.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,249.88 : 539,927.08 = 230,111.72 : x
  2. Step 2: Convert to fraction form
    391,249.88/539,927.08 = 230,111.72/x
  3. Step 3: Cross multiply
    391,249.88x = 539,927.08 × 230,111.72
  4. Step 4: Simplify right side
    391,249.88x = 124,243,549,053.38
  5. Step 5: Solve for x
    x = 124,243,549,053.38/391,249.88
  6. Step 6: Final answer
    x = 317,555.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.