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Finding the Fourth Proportional to 638,356.50, 880,938 and 351,886.86

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Solution

The fourth proportional to 638,356.50, 880,938 and 351,886.86 is: 485,607.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,356.50 : 880,938 = 351,886.86 : x
  2. Step 2: Convert to fraction form
    638,356.50/880,938 = 351,886.86/x
  3. Step 3: Cross multiply
    638,356.50x = 880,938 × 351,886.86
  4. Step 4: Simplify right side
    638,356.50x = 309,990,506,674.68
  5. Step 5: Solve for x
    x = 309,990,506,674.68/638,356.50
  6. Step 6: Final answer
    x = 485,607.19

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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.