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Finding the Fourth Proportional to 638,154.78, 880,653.60 and 351,674.87

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Solution

The fourth proportional to 638,154.78, 880,653.60 and 351,674.87 is: 485,311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,154.78 : 880,653.60 = 351,674.87 : x
  2. Step 2: Convert to fraction form
    638,154.78/880,653.60 = 351,674.87/x
  3. Step 3: Cross multiply
    638,154.78x = 880,653.60 × 351,674.87
  4. Step 4: Simplify right side
    638,154.78x = 309,703,735,891.76
  5. Step 5: Solve for x
    x = 309,703,735,891.76/638,154.78
  6. Step 6: Final answer
    x = 485,311.32

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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.