Home / 813,220.47-1,121,876.24-490,827.51

Finding the Fourth Proportional to 813,220.47, 1,121,876.24 and 490,827.51

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Solution

The fourth proportional to 813,220.47, 1,121,876.24 and 490,827.51 is: 677,119.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,220.47 : 1,121,876.24 = 490,827.51 : x
  2. Step 2: Convert to fraction form
    813,220.47/1,121,876.24 = 490,827.51/x
  3. Step 3: Cross multiply
    813,220.47x = 1,121,876.24 × 490,827.51
  4. Step 4: Simplify right side
    813,220.47x = 550,647,715,797.98
  5. Step 5: Solve for x
    x = 550,647,715,797.98/813,220.47
  6. Step 6: Final answer
    x = 677,119.85

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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.