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Finding the Fourth Proportional to 258,230.10, 387,345.15 and 157,190.70

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Solution

The fourth proportional to 258,230.10, 387,345.15 and 157,190.70 is: 235,786.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,230.10 : 387,345.15 = 157,190.70 : x
  2. Step 2: Convert to fraction form
    258,230.10/387,345.15 = 157,190.70/x
  3. Step 3: Cross multiply
    258,230.10x = 387,345.15 × 157,190.70
  4. Step 4: Simplify right side
    258,230.10x = 60,887,055,270.11
  5. Step 5: Solve for x
    x = 60,887,055,270.11/258,230.10
  6. Step 6: Final answer
    x = 235,786.05

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Similar ratio
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1.5x scale

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.