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Finding the Fourth Proportional to 840.57, 1,158.95 and 682.62

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Solution

The fourth proportional to 840.57, 1,158.95 and 682.62 is: 941.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.57 : 1,158.95 = 682.62 : x
  2. Step 2: Convert to fraction form
    840.57/1,158.95 = 682.62/x
  3. Step 3: Cross multiply
    840.57x = 1,158.95 × 682.62
  4. Step 4: Simplify right side
    840.57x = 791,119.04
  5. Step 5: Solve for x
    x = 791,119.04/840.57
  6. Step 6: Final answer
    x = 941.17

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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.