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Finding the Fourth Proportional to 208,455, 312,679.19 and 66,298.22

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Solution

The fourth proportional to 208,455, 312,679.19 and 66,298.22 is: 99,446.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,455 : 312,679.19 = 66,298.22 : x
  2. Step 2: Convert to fraction form
    208,455/312,679.19 = 66,298.22/x
  3. Step 3: Cross multiply
    208,455x = 312,679.19 × 66,298.22
  4. Step 4: Simplify right side
    208,455x = 20,730,074,675.49
  5. Step 5: Solve for x
    x = 20,730,074,675.49/208,455
  6. Step 6: Final answer
    x = 99,446.28

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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.