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Finding the Fourth Proportional to 1,127.92, 1,556.78 and 662.32

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Solution

The fourth proportional to 1,127.92, 1,556.78 and 662.32 is: 914.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.92 : 1,556.78 = 662.32 : x
  2. Step 2: Convert to fraction form
    1,127.92/1,556.78 = 662.32/x
  3. Step 3: Cross multiply
    1,127.92x = 1,556.78 × 662.32
  4. Step 4: Simplify right side
    1,127.92x = 1,031,086.53
  5. Step 5: Solve for x
    x = 1,031,086.53/1,127.92
  6. Step 6: Final answer
    x = 914.15

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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.