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Finding the Fourth Proportional to 614.79, 919.91 and 492.68

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Solution

The fourth proportional to 614.79, 919.91 and 492.68 is: 737.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.79 : 919.91 = 492.68 : x
  2. Step 2: Convert to fraction form
    614.79/919.91 = 492.68/x
  3. Step 3: Cross multiply
    614.79x = 919.91 × 492.68
  4. Step 4: Simplify right side
    614.79x = 453,222.02
  5. Step 5: Solve for x
    x = 453,222.02/614.79
  6. Step 6: Final answer
    x = 737.20

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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.