Home / 812,000.80-1,218,001.20-768,455.20

Finding the Fourth Proportional to 812,000.80, 1,218,001.20 and 768,455.20

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Solution

The fourth proportional to 812,000.80, 1,218,001.20 and 768,455.20 is: 1,152,682.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,000.80 : 1,218,001.20 = 768,455.20 : x
  2. Step 2: Convert to fraction form
    812,000.80/1,218,001.20 = 768,455.20/x
  3. Step 3: Cross multiply
    812,000.80x = 1,218,001.20 × 768,455.20
  4. Step 4: Simplify right side
    812,000.80x = 935,979,355,746.24
  5. Step 5: Solve for x
    x = 935,979,355,746.24/812,000.80
  6. Step 6: Final answer
    x = 1,152,682.80

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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.