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Finding the Fourth Proportional to 549.79, 758.62 and 328.81

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Solution

The fourth proportional to 549.79, 758.62 and 328.81 is: 453.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    549.79 : 758.62 = 328.81 : x
  2. Step 2: Convert to fraction form
    549.79/758.62 = 328.81/x
  3. Step 3: Cross multiply
    549.79x = 758.62 × 328.81
  4. Step 4: Simplify right side
    549.79x = 249,439.93
  5. Step 5: Solve for x
    x = 249,439.93/549.79
  6. Step 6: Final answer
    x = 453.70

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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.