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Finding the Fourth Proportional to 425,341.31, 637,995.45 and 105,493.97

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Solution

The fourth proportional to 425,341.31, 637,995.45 and 105,493.97 is: 158,236.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,341.31 : 637,995.45 = 105,493.97 : x
  2. Step 2: Convert to fraction form
    425,341.31/637,995.45 = 105,493.97/x
  3. Step 3: Cross multiply
    425,341.31x = 637,995.45 × 105,493.97
  4. Step 4: Simplify right side
    425,341.31x = 67,304,674,457.43
  5. Step 5: Solve for x
    x = 67,304,674,457.43/425,341.31
  6. Step 6: Final answer
    x = 158,236.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.