Home / 812,983.85-1,121,465.69-640,265.52

Finding the Fourth Proportional to 812,983.85, 1,121,465.69 and 640,265.52

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Solution

The fourth proportional to 812,983.85, 1,121,465.69 and 640,265.52 is: 883,210.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,983.85 : 1,121,465.69 = 640,265.52 : x
  2. Step 2: Convert to fraction form
    812,983.85/1,121,465.69 = 640,265.52/x
  3. Step 3: Cross multiply
    812,983.85x = 1,121,465.69 × 640,265.52
  4. Step 4: Simplify right side
    812,983.85x = 718,035,816,575.17
  5. Step 5: Solve for x
    x = 718,035,816,575.17/812,983.85
  6. Step 6: Final answer
    x = 883,210.43

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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.