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Finding the Fourth Proportional to 556,851.20, 835,276.80 and 320,921.60

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Solution

The fourth proportional to 556,851.20, 835,276.80 and 320,921.60 is: 481,382.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,851.20 : 835,276.80 = 320,921.60 : x
  2. Step 2: Convert to fraction form
    556,851.20/835,276.80 = 320,921.60/x
  3. Step 3: Cross multiply
    556,851.20x = 835,276.80 × 320,921.60
  4. Step 4: Simplify right side
    556,851.20x = 268,058,367,098.88
  5. Step 5: Solve for x
    x = 268,058,367,098.88/556,851.20
  6. Step 6: Final answer
    x = 481,382.40

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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.