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Finding the Fourth Proportional to 391,498.68, 539,754.12 and 282,511.56

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Solution

The fourth proportional to 391,498.68, 539,754.12 and 282,511.56 is: 389,495.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,498.68 : 539,754.12 = 282,511.56 : x
  2. Step 2: Convert to fraction form
    391,498.68/539,754.12 = 282,511.56/x
  3. Step 3: Cross multiply
    391,498.68x = 539,754.12 × 282,511.56
  4. Step 4: Simplify right side
    391,498.68x = 152,486,778,457.63
  5. Step 5: Solve for x
    x = 152,486,778,457.63/391,498.68
  6. Step 6: Final answer
    x = 389,495.00

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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.