Home / 810,990.29-1,216,670.22-431,711.19

Finding the Fourth Proportional to 810,990.29, 1,216,670.22 and 431,711.19

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Solution

The fourth proportional to 810,990.29, 1,216,670.22 and 431,711.19 is: 647,665.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,990.29 : 1,216,670.22 = 431,711.19 : x
  2. Step 2: Convert to fraction form
    810,990.29/1,216,670.22 = 431,711.19/x
  3. Step 3: Cross multiply
    810,990.29x = 1,216,670.22 × 431,711.19
  4. Step 4: Simplify right side
    810,990.29x = 525,250,148,513.76
  5. Step 5: Solve for x
    x = 525,250,148,513.76/810,990.29
  6. Step 6: Final answer
    x = 647,665.15

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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.