Home / 515,819.60-773,729.40-391,403.60

Finding the Fourth Proportional to 515,819.60, 773,729.40 and 391,403.60

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Solution

The fourth proportional to 515,819.60, 773,729.40 and 391,403.60 is: 587,105.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,819.60 : 773,729.40 = 391,403.60 : x
  2. Step 2: Convert to fraction form
    515,819.60/773,729.40 = 391,403.60/x
  3. Step 3: Cross multiply
    515,819.60x = 773,729.40 × 391,403.60
  4. Step 4: Simplify right side
    515,819.60x = 302,840,472,585.84
  5. Step 5: Solve for x
    x = 302,840,472,585.84/515,819.60
  6. Step 6: Final answer
    x = 587,105.40

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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.