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Finding the Fourth Proportional to 704.55, 1,056.80 and 210.95

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Solution

The fourth proportional to 704.55, 1,056.80 and 210.95 is: 316.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    704.55 : 1,056.80 = 210.95 : x
  2. Step 2: Convert to fraction form
    704.55/1,056.80 = 210.95/x
  3. Step 3: Cross multiply
    704.55x = 1,056.80 × 210.95
  4. Step 4: Simplify right side
    704.55x = 222,925.62
  5. Step 5: Solve for x
    x = 222,925.62/704.55
  6. Step 6: Final answer
    x = 316.41

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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.