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Finding the Fourth Proportional to 391,519.20, 587,278.80 and 346,904.40

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Solution

The fourth proportional to 391,519.20, 587,278.80 and 346,904.40 is: 520,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,519.20 : 587,278.80 = 346,904.40 : x
  2. Step 2: Convert to fraction form
    391,519.20/587,278.80 = 346,904.40/x
  3. Step 3: Cross multiply
    391,519.20x = 587,278.80 × 346,904.40
  4. Step 4: Simplify right side
    391,519.20x = 203,729,599,746.72
  5. Step 5: Solve for x
    x = 203,729,599,746.72/391,519.20
  6. Step 6: Final answer
    x = 520,356.60

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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.