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Finding the Fourth Proportional to 536.38, 740.34 and 315.40

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Solution

The fourth proportional to 536.38, 740.34 and 315.40 is: 435.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.38 : 740.34 = 315.40 : x
  2. Step 2: Convert to fraction form
    536.38/740.34 = 315.40/x
  3. Step 3: Cross multiply
    536.38x = 740.34 × 315.40
  4. Step 4: Simplify right side
    536.38x = 233,503.24
  5. Step 5: Solve for x
    x = 233,503.24/536.38
  6. Step 6: Final answer
    x = 435.33

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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.