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Finding the Fourth Proportional to 308,172.15, 425,275.47 and 172,206.44

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Solution

The fourth proportional to 308,172.15, 425,275.47 and 172,206.44 is: 237,643.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,172.15 : 425,275.47 = 172,206.44 : x
  2. Step 2: Convert to fraction form
    308,172.15/425,275.47 = 172,206.44/x
  3. Step 3: Cross multiply
    308,172.15x = 425,275.47 × 172,206.44
  4. Step 4: Simplify right side
    308,172.15x = 73,235,172,581.65
  5. Step 5: Solve for x
    x = 73,235,172,581.65/308,172.15
  6. Step 6: Final answer
    x = 237,643.71

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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.