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Finding the Fourth Proportional to 257,563.67, 386,341.40 and 70,575.17

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Solution

The fourth proportional to 257,563.67, 386,341.40 and 70,575.17 is: 105,861.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,563.67 : 386,341.40 = 70,575.17 : x
  2. Step 2: Convert to fraction form
    257,563.67/386,341.40 = 70,575.17/x
  3. Step 3: Cross multiply
    257,563.67x = 386,341.40 × 70,575.17
  4. Step 4: Simplify right side
    257,563.67x = 27,266,109,983.04
  5. Step 5: Solve for x
    x = 27,266,109,983.04/257,563.67
  6. Step 6: Final answer
    x = 105,861.63

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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.