Home / 812,780.30-1,121,530.55-468,629.12

Finding the Fourth Proportional to 812,780.30, 1,121,530.55 and 468,629.12

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Solution

The fourth proportional to 812,780.30, 1,121,530.55 and 468,629.12 is: 646,646.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,780.30 : 1,121,530.55 = 468,629.12 : x
  2. Step 2: Convert to fraction form
    812,780.30/1,121,530.55 = 468,629.12/x
  3. Step 3: Cross multiply
    812,780.30x = 1,121,530.55 × 468,629.12
  4. Step 4: Simplify right side
    812,780.30x = 525,581,866,748.82
  5. Step 5: Solve for x
    x = 525,581,866,748.82/812,780.30
  6. Step 6: Final answer
    x = 646,646.91

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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.