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Finding the Fourth Proportional to 245,253.71, 338,439.21 and 143,288.60

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Solution

The fourth proportional to 245,253.71, 338,439.21 and 143,288.60 is: 197,731.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,253.71 : 338,439.21 = 143,288.60 : x
  2. Step 2: Convert to fraction form
    245,253.71/338,439.21 = 143,288.60/x
  3. Step 3: Cross multiply
    245,253.71x = 338,439.21 × 143,288.60
  4. Step 4: Simplify right side
    245,253.71x = 48,494,480,586.01
  5. Step 5: Solve for x
    x = 48,494,480,586.01/245,253.71
  6. Step 6: Final answer
    x = 197,731.89

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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.