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Finding the Fourth Proportional to 611.71, 912.12 and 604.15

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Solution

The fourth proportional to 611.71, 912.12 and 604.15 is: 900.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.71 : 912.12 = 604.15 : x
  2. Step 2: Convert to fraction form
    611.71/912.12 = 604.15/x
  3. Step 3: Cross multiply
    611.71x = 912.12 × 604.15
  4. Step 4: Simplify right side
    611.71x = 551,055.79
  5. Step 5: Solve for x
    x = 551,055.79/611.71
  6. Step 6: Final answer
    x = 900.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.