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Finding the Fourth Proportional to 292,628.15, 438,971.46 and 79,399.45

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Solution

The fourth proportional to 292,628.15, 438,971.46 and 79,399.45 is: 119,107.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,628.15 : 438,971.46 = 79,399.45 : x
  2. Step 2: Convert to fraction form
    292,628.15/438,971.46 = 79,399.45/x
  3. Step 3: Cross multiply
    292,628.15x = 438,971.46 × 79,399.45
  4. Step 4: Simplify right side
    292,628.15x = 34,854,092,489.70
  5. Step 5: Solve for x
    x = 34,854,092,489.70/292,628.15
  6. Step 6: Final answer
    x = 119,107.11

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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.