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Finding the Fourth Proportional to 425,741.50, 638,612.25 and 173,159.40

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Solution

The fourth proportional to 425,741.50, 638,612.25 and 173,159.40 is: 259,739.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,741.50 : 638,612.25 = 173,159.40 : x
  2. Step 2: Convert to fraction form
    425,741.50/638,612.25 = 173,159.40/x
  3. Step 3: Cross multiply
    425,741.50x = 638,612.25 × 173,159.40
  4. Step 4: Simplify right side
    425,741.50x = 110,581,714,042.65
  5. Step 5: Solve for x
    x = 110,581,714,042.65/425,741.50
  6. Step 6: Final answer
    x = 259,739.10

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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.