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Finding the Fourth Proportional to 318,048.78, 438,879.90 and 187,212.54

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Solution

The fourth proportional to 318,048.78, 438,879.90 and 187,212.54 is: 258,337.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,048.78 : 438,879.90 = 187,212.54 : x
  2. Step 2: Convert to fraction form
    318,048.78/438,879.90 = 187,212.54/x
  3. Step 3: Cross multiply
    318,048.78x = 438,879.90 × 187,212.54
  4. Step 4: Simplify right side
    318,048.78x = 82,163,820,833.95
  5. Step 5: Solve for x
    x = 82,163,820,833.95/318,048.78
  6. Step 6: Final answer
    x = 258,337.17

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1.5x scale

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.