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Finding the Fourth Proportional to 612,430.28, 918,586.03 and 185,969.80

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Solution

The fourth proportional to 612,430.28, 918,586.03 and 185,969.80 is: 278,936.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,430.28 : 918,586.03 = 185,969.80 : x
  2. Step 2: Convert to fraction form
    612,430.28/918,586.03 = 185,969.80/x
  3. Step 3: Cross multiply
    612,430.28x = 918,586.03 × 185,969.80
  4. Step 4: Simplify right side
    612,430.28x = 170,829,259,816.97
  5. Step 5: Solve for x
    x = 170,829,259,816.97/612,430.28
  6. Step 6: Final answer
    x = 278,936.66

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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.