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Finding the Fourth Proportional to 245,658.90, 339,010.74 and 138,230.76

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Solution

The fourth proportional to 245,658.90, 339,010.74 and 138,230.76 is: 190,759.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,658.90 : 339,010.74 = 138,230.76 : x
  2. Step 2: Convert to fraction form
    245,658.90/339,010.74 = 138,230.76/x
  3. Step 3: Cross multiply
    245,658.90x = 339,010.74 × 138,230.76
  4. Step 4: Simplify right side
    245,658.90x = 46,861,712,238.36
  5. Step 5: Solve for x
    x = 46,861,712,238.36/245,658.90
  6. Step 6: Final answer
    x = 190,759.27

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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.