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Finding the Fourth Proportional to 418,975.77, 628,464.96 and 103,432.71

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Solution

The fourth proportional to 418,975.77, 628,464.96 and 103,432.71 is: 155,149.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,975.77 : 628,464.96 = 103,432.71 : x
  2. Step 2: Convert to fraction form
    418,975.77/628,464.96 = 103,432.71/x
  3. Step 3: Cross multiply
    418,975.77x = 628,464.96 × 103,432.71
  4. Step 4: Simplify right side
    418,975.77x = 65,003,833,952.84
  5. Step 5: Solve for x
    x = 65,003,833,952.84/418,975.77
  6. Step 6: Final answer
    x = 155,149.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.