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Finding the Fourth Proportional to 536.28, 740.10 and 315.15

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Solution

The fourth proportional to 536.28, 740.10 and 315.15 is: 434.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.28 : 740.10 = 315.15 : x
  2. Step 2: Convert to fraction form
    536.28/740.10 = 315.15/x
  3. Step 3: Cross multiply
    536.28x = 740.10 × 315.15
  4. Step 4: Simplify right side
    536.28x = 233,242.52
  5. Step 5: Solve for x
    x = 233,242.52/536.28
  6. Step 6: Final answer
    x = 434.93

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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.