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Finding the Fourth Proportional to 638,145.80, 880,599.44 and 351,665.81

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Solution

The fourth proportional to 638,145.80, 880,599.44 and 351,665.81 is: 485,275.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,145.80 : 880,599.44 = 351,665.81 : x
  2. Step 2: Convert to fraction form
    638,145.80/880,599.44 = 351,665.81/x
  3. Step 3: Cross multiply
    638,145.80x = 880,599.44 × 351,665.81
  4. Step 4: Simplify right side
    638,145.80x = 309,676,709,191.82
  5. Step 5: Solve for x
    x = 309,676,709,191.82/638,145.80
  6. Step 6: Final answer
    x = 485,275.80

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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.