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Finding the Fourth Proportional to 288,000.20, 432,000.30 and 199,065.80

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Solution

The fourth proportional to 288,000.20, 432,000.30 and 199,065.80 is: 298,598.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,000.20 : 432,000.30 = 199,065.80 : x
  2. Step 2: Convert to fraction form
    288,000.20/432,000.30 = 199,065.80/x
  3. Step 3: Cross multiply
    288,000.20x = 432,000.30 × 199,065.80
  4. Step 4: Simplify right side
    288,000.20x = 85,996,485,319.74
  5. Step 5: Solve for x
    x = 85,996,485,319.74/288,000.20
  6. Step 6: Final answer
    x = 298,598.70

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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.