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Finding the Fourth Proportional to 308,547.30, 425,834.70 and 172,588.80

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Solution

The fourth proportional to 308,547.30, 425,834.70 and 172,588.80 is: 238,194.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,547.30 : 425,834.70 = 172,588.80 : x
  2. Step 2: Convert to fraction form
    308,547.30/425,834.70 = 172,588.80/x
  3. Step 3: Cross multiply
    308,547.30x = 425,834.70 × 172,588.80
  4. Step 4: Simplify right side
    308,547.30x = 73,494,299,871.36
  5. Step 5: Solve for x
    x = 73,494,299,871.36/308,547.30
  6. Step 6: Final answer
    x = 238,194.60

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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.