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Finding the Fourth Proportional to 638,055.60, 880,555.95 and 351,575.61

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Solution

The fourth proportional to 638,055.60, 880,555.95 and 351,575.61 is: 485,195.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,055.60 : 880,555.95 = 351,575.61 : x
  2. Step 2: Convert to fraction form
    638,055.60/880,555.95 = 351,575.61/x
  3. Step 3: Cross multiply
    638,055.60x = 880,555.95 × 351,575.61
  4. Step 4: Simplify right side
    638,055.60x = 309,581,995,260.38
  5. Step 5: Solve for x
    x = 309,581,995,260.38/638,055.60
  6. Step 6: Final answer
    x = 485,195.95

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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.