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Finding the Fourth Proportional to 391,514.68, 540,328.14 and 219,461.86

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Solution

The fourth proportional to 391,514.68, 540,328.14 and 219,461.86 is: 302,878.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,514.68 : 540,328.14 = 219,461.86 : x
  2. Step 2: Convert to fraction form
    391,514.68/540,328.14 = 219,461.86/x
  3. Step 3: Cross multiply
    391,514.68x = 540,328.14 × 219,461.86
  4. Step 4: Simplify right side
    391,514.68x = 118,581,418,614.74
  5. Step 5: Solve for x
    x = 118,581,418,614.74/391,514.68
  6. Step 6: Final answer
    x = 302,878.60

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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.