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Finding the Fourth Proportional to 308,298.74, 425,397.83 and 172,289.21

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Solution

The fourth proportional to 308,298.74, 425,397.83 and 172,289.21 is: 237,728.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,298.74 : 425,397.83 = 172,289.21 : x
  2. Step 2: Convert to fraction form
    308,298.74/425,397.83 = 172,289.21/x
  3. Step 3: Cross multiply
    308,298.74x = 425,397.83 × 172,289.21
  4. Step 4: Simplify right side
    308,298.74x = 73,291,453,077.98
  5. Step 5: Solve for x
    x = 73,291,453,077.98/308,298.74
  6. Step 6: Final answer
    x = 237,728.69

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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.