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Finding the Fourth Proportional to 459.07, 689.92 and 427.95

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Solution

The fourth proportional to 459.07, 689.92 and 427.95 is: 643.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.07 : 689.92 = 427.95 : x
  2. Step 2: Convert to fraction form
    459.07/689.92 = 427.95/x
  3. Step 3: Cross multiply
    459.07x = 689.92 × 427.95
  4. Step 4: Simplify right side
    459.07x = 295,250.19
  5. Step 5: Solve for x
    x = 295,250.19/459.07
  6. Step 6: Final answer
    x = 643.15

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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.