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Finding the Fourth Proportional to 1,242.45, 1,714.58 and 682.95

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Solution

The fourth proportional to 1,242.45, 1,714.58 and 682.95 is: 942.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,242.45 : 1,714.58 = 682.95 : x
  2. Step 2: Convert to fraction form
    1,242.45/1,714.58 = 682.95/x
  3. Step 3: Cross multiply
    1,242.45x = 1,714.58 × 682.95
  4. Step 4: Simplify right side
    1,242.45x = 1,170,972.41
  5. Step 5: Solve for x
    x = 1,170,972.41/1,242.45
  6. Step 6: Final answer
    x = 942.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.