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Finding the Fourth Proportional to 519.36, 780.48 and 358.08

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Solution

The fourth proportional to 519.36, 780.48 and 358.08 is: 538.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.36 : 780.48 = 358.08 : x
  2. Step 2: Convert to fraction form
    519.36/780.48 = 358.08/x
  3. Step 3: Cross multiply
    519.36x = 780.48 × 358.08
  4. Step 4: Simplify right side
    519.36x = 279,474.28
  5. Step 5: Solve for x
    x = 279,474.28/519.36
  6. Step 6: Final answer
    x = 538.11

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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.