Home / 638,392.37-880,987.45-351,922.70

Finding the Fourth Proportional to 638,392.37, 880,987.45 and 351,922.70

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Solution

The fourth proportional to 638,392.37, 880,987.45 and 351,922.70 is: 485,656.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,392.37 : 880,987.45 = 351,922.70 : x
  2. Step 2: Convert to fraction form
    638,392.37/880,987.45 = 351,922.70/x
  3. Step 3: Cross multiply
    638,392.37x = 880,987.45 × 351,922.70
  4. Step 4: Simplify right side
    638,392.37x = 310,039,482,070.12
  5. Step 5: Solve for x
    x = 310,039,482,070.12/638,392.37
  6. Step 6: Final answer
    x = 485,656.62

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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.