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Finding the Fourth Proportional to 880.42, 1,214.93 and 548.90

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Solution

The fourth proportional to 880.42, 1,214.93 and 548.90 is: 757.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.42 : 1,214.93 = 548.90 : x
  2. Step 2: Convert to fraction form
    880.42/1,214.93 = 548.90/x
  3. Step 3: Cross multiply
    880.42x = 1,214.93 × 548.90
  4. Step 4: Simplify right side
    880.42x = 666,875.08
  5. Step 5: Solve for x
    x = 666,875.08/880.42
  6. Step 6: Final answer
    x = 757.45

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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.