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Finding the Fourth Proportional to 245,242.16, 338,440.20 and 137,805.74

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Solution

The fourth proportional to 245,242.16, 338,440.20 and 137,805.74 is: 190,175.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,242.16 : 338,440.20 = 137,805.74 : x
  2. Step 2: Convert to fraction form
    245,242.16/338,440.20 = 137,805.74/x
  3. Step 3: Cross multiply
    245,242.16x = 338,440.20 × 137,805.74
  4. Step 4: Simplify right side
    245,242.16x = 46,639,002,206.75
  5. Step 5: Solve for x
    x = 46,639,002,206.75/245,242.16
  6. Step 6: Final answer
    x = 190,175.30

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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.