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Finding the Fourth Proportional to 459.63, 689.45 and 368.21

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Solution

The fourth proportional to 459.63, 689.45 and 368.21 is: 552.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.63 : 689.45 = 368.21 : x
  2. Step 2: Convert to fraction form
    459.63/689.45 = 368.21/x
  3. Step 3: Cross multiply
    459.63x = 689.45 × 368.21
  4. Step 4: Simplify right side
    459.63x = 253,862.38
  5. Step 5: Solve for x
    x = 253,862.38/459.63
  6. Step 6: Final answer
    x = 552.32

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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.