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Finding the Fourth Proportional to 863.50, 1,295.78 and 555.55

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Solution

The fourth proportional to 863.50, 1,295.78 and 555.55 is: 833.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.50 : 1,295.78 = 555.55 : x
  2. Step 2: Convert to fraction form
    863.50/1,295.78 = 555.55/x
  3. Step 3: Cross multiply
    863.50x = 1,295.78 × 555.55
  4. Step 4: Simplify right side
    863.50x = 719,870.58
  5. Step 5: Solve for x
    x = 719,870.58/863.50
  6. Step 6: Final answer
    x = 833.67

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1.5x scale

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.