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Finding the Fourth Proportional to 308,657.42, 425,963.80 and 172,683.27

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Solution

The fourth proportional to 308,657.42, 425,963.80 and 172,683.27 is: 238,312.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,657.42 : 425,963.80 = 172,683.27 : x
  2. Step 2: Convert to fraction form
    308,657.42/425,963.80 = 172,683.27/x
  3. Step 3: Cross multiply
    308,657.42x = 425,963.80 × 172,683.27
  4. Step 4: Simplify right side
    308,657.42x = 73,556,822,101.48
  5. Step 5: Solve for x
    x = 73,556,822,101.48/308,657.42
  6. Step 6: Final answer
    x = 238,312.18

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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.