Home / 812,076.30-1,218,114.45-413,495.55

Finding the Fourth Proportional to 812,076.30, 1,218,114.45 and 413,495.55

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Solution

The fourth proportional to 812,076.30, 1,218,114.45 and 413,495.55 is: 620,243.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,076.30 : 1,218,114.45 = 413,495.55 : x
  2. Step 2: Convert to fraction form
    812,076.30/1,218,114.45 = 413,495.55/x
  3. Step 3: Cross multiply
    812,076.30x = 1,218,114.45 × 413,495.55
  4. Step 4: Simplify right side
    812,076.30x = 503,684,904,465.70
  5. Step 5: Solve for x
    x = 503,684,904,465.70/812,076.30
  6. Step 6: Final answer
    x = 620,243.33

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Double scale
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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.