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Finding the Fourth Proportional to 460.98, 690.78 and 186.93

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Solution

The fourth proportional to 460.98, 690.78 and 186.93 is: 280.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.98 : 690.78 = 186.93 : x
  2. Step 2: Convert to fraction form
    460.98/690.78 = 186.93/x
  3. Step 3: Cross multiply
    460.98x = 690.78 × 186.93
  4. Step 4: Simplify right side
    460.98x = 129,127.51
  5. Step 5: Solve for x
    x = 129,127.51/460.98
  6. Step 6: Final answer
    x = 280.12

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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.