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Finding the Fourth Proportional to 308,108.28, 425,189.86 and 187,217.40

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Solution

The fourth proportional to 308,108.28, 425,189.86 and 187,217.40 is: 258,360.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,108.28 : 425,189.86 = 187,217.40 : x
  2. Step 2: Convert to fraction form
    308,108.28/425,189.86 = 187,217.40/x
  3. Step 3: Cross multiply
    308,108.28x = 425,189.86 × 187,217.40
  4. Step 4: Simplify right side
    308,108.28x = 79,602,940,095.56
  5. Step 5: Solve for x
    x = 79,602,940,095.56/308,108.28
  6. Step 6: Final answer
    x = 258,360.28

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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.