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Finding the Fourth Proportional to 288,959.20, 432,855.60 and 200,312.80

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Solution

The fourth proportional to 288,959.20, 432,855.60 and 200,312.80 is: 300,064.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,959.20 : 432,855.60 = 200,312.80 : x
  2. Step 2: Convert to fraction form
    288,959.20/432,855.60 = 200,312.80/x
  3. Step 3: Cross multiply
    288,959.20x = 432,855.60 × 200,312.80
  4. Step 4: Simplify right side
    288,959.20x = 86,706,517,231.68
  5. Step 5: Solve for x
    x = 86,706,517,231.68/288,959.20
  6. Step 6: Final answer
    x = 300,064.91

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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.