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Finding the Fourth Proportional to 611.76, 918.60 and 589.68

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Solution

The fourth proportional to 611.76, 918.60 and 589.68 is: 885.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.76 : 918.60 = 589.68 : x
  2. Step 2: Convert to fraction form
    611.76/918.60 = 589.68/x
  3. Step 3: Cross multiply
    611.76x = 918.60 × 589.68
  4. Step 4: Simplify right side
    611.76x = 541,680.05
  5. Step 5: Solve for x
    x = 541,680.05/611.76
  6. Step 6: Final answer
    x = 885.45

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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.