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Finding the Fourth Proportional to 536.36, 740.10 and 309.20

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Solution

The fourth proportional to 536.36, 740.10 and 309.20 is: 426.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.36 : 740.10 = 309.20 : x
  2. Step 2: Convert to fraction form
    536.36/740.10 = 309.20/x
  3. Step 3: Cross multiply
    536.36x = 740.10 × 309.20
  4. Step 4: Simplify right side
    536.36x = 228,838.92
  5. Step 5: Solve for x
    x = 228,838.92/536.36
  6. Step 6: Final answer
    x = 426.65

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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.