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Finding the Fourth Proportional to 258,142.20, 387,213.30 and 242,590.20

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Solution

The fourth proportional to 258,142.20, 387,213.30 and 242,590.20 is: 363,885.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,142.20 : 387,213.30 = 242,590.20 : x
  2. Step 2: Convert to fraction form
    258,142.20/387,213.30 = 242,590.20/x
  3. Step 3: Cross multiply
    258,142.20x = 387,213.30 × 242,590.20
  4. Step 4: Simplify right side
    258,142.20x = 93,934,151,889.66
  5. Step 5: Solve for x
    x = 93,934,151,889.66/258,142.20
  6. Step 6: Final answer
    x = 363,885.30

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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.