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Finding the Fourth Proportional to 573.16, 859.74 and 140.31

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Solution

The fourth proportional to 573.16, 859.74 and 140.31 is: 210.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.16 : 859.74 = 140.31 : x
  2. Step 2: Convert to fraction form
    573.16/859.74 = 140.31/x
  3. Step 3: Cross multiply
    573.16x = 859.74 × 140.31
  4. Step 4: Simplify right side
    573.16x = 120,630.12
  5. Step 5: Solve for x
    x = 120,630.12/573.16
  6. Step 6: Final answer
    x = 210.47

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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.