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Finding the Fourth Proportional to 429.63, 591.89 and 355.72

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Solution

The fourth proportional to 429.63, 591.89 and 355.72 is: 490.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    429.63 : 591.89 = 355.72 : x
  2. Step 2: Convert to fraction form
    429.63/591.89 = 355.72/x
  3. Step 3: Cross multiply
    429.63x = 591.89 × 355.72
  4. Step 4: Simplify right side
    429.63x = 210,547.11
  5. Step 5: Solve for x
    x = 210,547.11/429.63
  6. Step 6: Final answer
    x = 490.07

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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.