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Finding the Fourth Proportional to 555,309.05, 831,853.67 and 255,378.60

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Solution

The fourth proportional to 555,309.05, 831,853.67 and 255,378.60 is: 382,557.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,309.05 : 831,853.67 = 255,378.60 : x
  2. Step 2: Convert to fraction form
    555,309.05/831,853.67 = 255,378.60/x
  3. Step 3: Cross multiply
    555,309.05x = 831,853.67 × 255,378.60
  4. Step 4: Simplify right side
    555,309.05x = 212,437,624,372.57
  5. Step 5: Solve for x
    x = 212,437,624,372.57/555,309.05
  6. Step 6: Final answer
    x = 382,557.47

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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.