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Finding the Fourth Proportional to 391,030.14, 539,705.97 and 238,119.06

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Solution

The fourth proportional to 391,030.14, 539,705.97 and 238,119.06 is: 328,655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,030.14 : 539,705.97 = 238,119.06 : x
  2. Step 2: Convert to fraction form
    391,030.14/539,705.97 = 238,119.06/x
  3. Step 3: Cross multiply
    391,030.14x = 539,705.97 × 238,119.06
  4. Step 4: Simplify right side
    391,030.14x = 128,514,278,252.79
  5. Step 5: Solve for x
    x = 128,514,278,252.79/391,030.14
  6. Step 6: Final answer
    x = 328,655.68

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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.