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Finding the Fourth Proportional to 1,096.40, 1,643.38 and 548.08

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Solution

The fourth proportional to 1,096.40, 1,643.38 and 548.08 is: 821.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,096.40 : 1,643.38 = 548.08 : x
  2. Step 2: Convert to fraction form
    1,096.40/1,643.38 = 548.08/x
  3. Step 3: Cross multiply
    1,096.40x = 1,643.38 × 548.08
  4. Step 4: Simplify right side
    1,096.40x = 900,703.71
  5. Step 5: Solve for x
    x = 900,703.71/1,096.40
  6. Step 6: Final answer
    x = 821.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.