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Finding the Fourth Proportional to 521,920.80, 782,881.20 and 256,200.30

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Solution

The fourth proportional to 521,920.80, 782,881.20 and 256,200.30 is: 384,300.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,920.80 : 782,881.20 = 256,200.30 : x
  2. Step 2: Convert to fraction form
    521,920.80/782,881.20 = 256,200.30/x
  3. Step 3: Cross multiply
    521,920.80x = 782,881.20 × 256,200.30
  4. Step 4: Simplify right side
    521,920.80x = 200,574,398,304.36
  5. Step 5: Solve for x
    x = 200,574,398,304.36/521,920.80
  6. Step 6: Final answer
    x = 384,300.45

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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.