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Finding the Fourth Proportional to 245,576.87, 338,895.54 and 138,146.90

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Solution

The fourth proportional to 245,576.87, 338,895.54 and 138,146.90 is: 190,642.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,576.87 : 338,895.54 = 138,146.90 : x
  2. Step 2: Convert to fraction form
    245,576.87/338,895.54 = 138,146.90/x
  3. Step 3: Cross multiply
    245,576.87x = 338,895.54 × 138,146.90
  4. Step 4: Simplify right side
    245,576.87x = 46,817,366,580.35
  5. Step 5: Solve for x
    x = 46,817,366,580.35/245,576.87
  6. Step 6: Final answer
    x = 190,642.41

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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.