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Finding the Fourth Proportional to 768,085.60, 1,152,128.40 and 712,098.40

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Solution

The fourth proportional to 768,085.60, 1,152,128.40 and 712,098.40 is: 1,068,147.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,085.60 : 1,152,128.40 = 712,098.40 : x
  2. Step 2: Convert to fraction form
    768,085.60/1,152,128.40 = 712,098.40/x
  3. Step 3: Cross multiply
    768,085.60x = 1,152,128.40 × 712,098.40
  4. Step 4: Simplify right side
    768,085.60x = 820,428,790,234.56
  5. Step 5: Solve for x
    x = 820,428,790,234.56/768,085.60
  6. Step 6: Final answer
    x = 1,068,147.60

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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.