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Finding the Fourth Proportional to 638,124.67, 880,617.86 and 351,655.03

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Solution

The fourth proportional to 638,124.67, 880,617.86 and 351,655.03 is: 485,287.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,124.67 : 880,617.86 = 351,655.03 : x
  2. Step 2: Convert to fraction form
    638,124.67/880,617.86 = 351,655.03/x
  3. Step 3: Cross multiply
    638,124.67x = 880,617.86 × 351,655.03
  4. Step 4: Simplify right side
    638,124.67x = 309,673,697,335.72
  5. Step 5: Solve for x
    x = 309,673,697,335.72/638,124.67
  6. Step 6: Final answer
    x = 485,287.14

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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.