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Finding the Fourth Proportional to 788.55, 1,176.98 and 696.30

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Solution

The fourth proportional to 788.55, 1,176.98 and 696.30 is: 1,039.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.55 : 1,176.98 = 696.30 : x
  2. Step 2: Convert to fraction form
    788.55/1,176.98 = 696.30/x
  3. Step 3: Cross multiply
    788.55x = 1,176.98 × 696.30
  4. Step 4: Simplify right side
    788.55x = 819,527.69
  5. Step 5: Solve for x
    x = 819,527.69/788.55
  6. Step 6: Final answer
    x = 1,039.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.