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Finding the Fourth Proportional to 788.48, 1,087.32 and 622.36

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Solution

The fourth proportional to 788.48, 1,087.32 and 622.36 is: 858.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.48 : 1,087.32 = 622.36 : x
  2. Step 2: Convert to fraction form
    788.48/1,087.32 = 622.36/x
  3. Step 3: Cross multiply
    788.48x = 1,087.32 × 622.36
  4. Step 4: Simplify right side
    788.48x = 676,704.48
  5. Step 5: Solve for x
    x = 676,704.48/788.48
  6. Step 6: Final answer
    x = 858.24

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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.