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Finding the Fourth Proportional to 308,338.75, 425,510.63 and 172,380.25

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Solution

The fourth proportional to 308,338.75, 425,510.63 and 172,380.25 is: 237,886.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,338.75 : 425,510.63 = 172,380.25 : x
  2. Step 2: Convert to fraction form
    308,338.75/425,510.63 = 172,380.25/x
  3. Step 3: Cross multiply
    308,338.75x = 425,510.63 × 172,380.25
  4. Step 4: Simplify right side
    308,338.75x = 73,349,625,787.60
  5. Step 5: Solve for x
    x = 73,349,625,787.60/308,338.75
  6. Step 6: Final answer
    x = 237,886.50

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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.