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Finding the Fourth Proportional to 775.54, 1,069.42 and 551.37

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Solution

The fourth proportional to 775.54, 1,069.42 and 551.37 is: 760.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.54 : 1,069.42 = 551.37 : x
  2. Step 2: Convert to fraction form
    775.54/1,069.42 = 551.37/x
  3. Step 3: Cross multiply
    775.54x = 1,069.42 × 551.37
  4. Step 4: Simplify right side
    775.54x = 589,646.11
  5. Step 5: Solve for x
    x = 589,646.11/775.54
  6. Step 6: Final answer
    x = 760.30

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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.