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Finding the Fourth Proportional to 788.55, 1,106.40 and 788.55

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Solution

The fourth proportional to 788.55, 1,106.40 and 788.55 is: 1,106.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    788.55 : 1,106.40 = 788.55 : x
  2. Step 2: Convert to fraction form
    788.55/1,106.40 = 788.55/x
  3. Step 3: Cross multiply
    788.55x = 1,106.40 × 788.55
  4. Step 4: Simplify right side
    788.55x = 872,451.72
  5. Step 5: Solve for x
    x = 872,451.72/788.55
  6. Step 6: Final answer
    x = 1,106.40

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.