Home / 812,355.78-1,121,086.02-449,779.65

Finding the Fourth Proportional to 812,355.78, 1,121,086.02 and 449,779.65

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Solution

The fourth proportional to 812,355.78, 1,121,086.02 and 449,779.65 is: 620,715.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,355.78 : 1,121,086.02 = 449,779.65 : x
  2. Step 2: Convert to fraction form
    812,355.78/1,121,086.02 = 449,779.65/x
  3. Step 3: Cross multiply
    812,355.78x = 1,121,086.02 × 449,779.65
  4. Step 4: Simplify right side
    812,355.78x = 504,241,677,695.49
  5. Step 5: Solve for x
    x = 504,241,677,695.49/812,355.78
  6. Step 6: Final answer
    x = 620,715.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.