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Finding the Fourth Proportional to 768,120.32, 1,059,710.40 and 481,140.80

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Solution

The fourth proportional to 768,120.32, 1,059,710.40 and 481,140.80 is: 663,789.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,120.32 : 1,059,710.40 = 481,140.80 : x
  2. Step 2: Convert to fraction form
    768,120.32/1,059,710.40 = 481,140.80/x
  3. Step 3: Cross multiply
    768,120.32x = 1,059,710.40 × 481,140.80
  4. Step 4: Simplify right side
    768,120.32x = 509,869,909,624.32
  5. Step 5: Solve for x
    x = 509,869,909,624.32/768,120.32
  6. Step 6: Final answer
    x = 663,789.12

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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.