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Finding the Fourth Proportional to 408,053.70, 612,080.55 and 289,080.90

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Solution

The fourth proportional to 408,053.70, 612,080.55 and 289,080.90 is: 433,621.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,053.70 : 612,080.55 = 289,080.90 : x
  2. Step 2: Convert to fraction form
    408,053.70/612,080.55 = 289,080.90/x
  3. Step 3: Cross multiply
    408,053.70x = 612,080.55 × 289,080.90
  4. Step 4: Simplify right side
    408,053.70x = 176,940,796,266.50
  5. Step 5: Solve for x
    x = 176,940,796,266.50/408,053.70
  6. Step 6: Final answer
    x = 433,621.35

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Similar ratio
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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.