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Finding the Fourth Proportional to 536.45, 740.76 and 340.31

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Solution

The fourth proportional to 536.45, 740.76 and 340.31 is: 469.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.45 : 740.76 = 340.31 : x
  2. Step 2: Convert to fraction form
    536.45/740.76 = 340.31/x
  3. Step 3: Cross multiply
    536.45x = 740.76 × 340.31
  4. Step 4: Simplify right side
    536.45x = 252,088.04
  5. Step 5: Solve for x
    x = 252,088.04/536.45
  6. Step 6: Final answer
    x = 469.92

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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.