Home / 638,403.30-880,987.02-351,917.22

Finding the Fourth Proportional to 638,403.30, 880,987.02 and 351,917.22

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Solution

The fourth proportional to 638,403.30, 880,987.02 and 351,917.22 is: 485,640.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,403.30 : 880,987.02 = 351,917.22 : x
  2. Step 2: Convert to fraction form
    638,403.30/880,987.02 = 351,917.22/x
  3. Step 3: Cross multiply
    638,403.30x = 880,987.02 × 351,917.22
  4. Step 4: Simplify right side
    638,403.30x = 310,034,502,934.48
  5. Step 5: Solve for x
    x = 310,034,502,934.48/638,403.30
  6. Step 6: Final answer
    x = 485,640.51

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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.