Home / 811,085.28-1,215,874.89-384,821.43

Finding the Fourth Proportional to 811,085.28, 1,215,874.89 and 384,821.43

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Solution

The fourth proportional to 811,085.28, 1,215,874.89 and 384,821.43 is: 576,874.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,085.28 : 1,215,874.89 = 384,821.43 : x
  2. Step 2: Convert to fraction form
    811,085.28/1,215,874.89 = 384,821.43/x
  3. Step 3: Cross multiply
    811,085.28x = 1,215,874.89 × 384,821.43
  4. Step 4: Simplify right side
    811,085.28x = 467,894,713,870.89
  5. Step 5: Solve for x
    x = 467,894,713,870.89/811,085.28
  6. Step 6: Final answer
    x = 576,874.87

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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.