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Finding the Fourth Proportional to 308,310.31, 425,536.86 and 187,426

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Solution

The fourth proportional to 308,310.31, 425,536.86 and 187,426 is: 258,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,310.31 : 425,536.86 = 187,426 : x
  2. Step 2: Convert to fraction form
    308,310.31/425,536.86 = 187,426/x
  3. Step 3: Cross multiply
    308,310.31x = 425,536.86 × 187,426
  4. Step 4: Simplify right side
    308,310.31x = 79,756,671,522.36
  5. Step 5: Solve for x
    x = 79,756,671,522.36/308,310.31
  6. Step 6: Final answer
    x = 258,689.60

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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.