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Finding the Fourth Proportional to 788.36, 1,087.50 and 732.76

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Solution

The fourth proportional to 788.36, 1,087.50 and 732.76 is: 1,010.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.36 : 1,087.50 = 732.76 : x
  2. Step 2: Convert to fraction form
    788.36/1,087.50 = 732.76/x
  3. Step 3: Cross multiply
    788.36x = 1,087.50 × 732.76
  4. Step 4: Simplify right side
    788.36x = 796,876.50
  5. Step 5: Solve for x
    x = 796,876.50/788.36
  6. Step 6: Final answer
    x = 1,010.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.