Home / 768,517.60-1,152,085.20-487,890.40

Finding the Fourth Proportional to 768,517.60, 1,152,085.20 and 487,890.40

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Solution

The fourth proportional to 768,517.60, 1,152,085.20 and 487,890.40 is: 731,396.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,517.60 : 1,152,085.20 = 487,890.40 : x
  2. Step 2: Convert to fraction form
    768,517.60/1,152,085.20 = 487,890.40/x
  3. Step 3: Cross multiply
    768,517.60x = 1,152,085.20 × 487,890.40
  4. Step 4: Simplify right side
    768,517.60x = 562,091,309,062.08
  5. Step 5: Solve for x
    x = 562,091,309,062.08/768,517.60
  6. Step 6: Final answer
    x = 731,396.79

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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.