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Finding the Fourth Proportional to 638,187.98, 880,705.23 and 351,718.46

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Solution

The fourth proportional to 638,187.98, 880,705.23 and 351,718.46 is: 485,374.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,187.98 : 880,705.23 = 351,718.46 : x
  2. Step 2: Convert to fraction form
    638,187.98/880,705.23 = 351,718.46/x
  3. Step 3: Cross multiply
    638,187.98x = 880,705.23 × 351,718.46
  4. Step 4: Simplify right side
    638,187.98x = 309,760,287,209.55
  5. Step 5: Solve for x
    x = 309,760,287,209.55/638,187.98
  6. Step 6: Final answer
    x = 485,374.68

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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.