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Finding the Fourth Proportional to 936, 1,403.84 and 358.72

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Solution

The fourth proportional to 936, 1,403.84 and 358.72 is: 538.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    936 : 1,403.84 = 358.72 : x
  2. Step 2: Convert to fraction form
    936/1,403.84 = 358.72/x
  3. Step 3: Cross multiply
    936x = 1,403.84 × 358.72
  4. Step 4: Simplify right side
    936x = 503,585.48
  5. Step 5: Solve for x
    x = 503,585.48/936
  6. Step 6: Final answer
    x = 538.02

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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.