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Finding the Fourth Proportional to 536.48, 740.31 and 315.47

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Solution

The fourth proportional to 536.48, 740.31 and 315.47 is: 435.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.48 : 740.31 = 315.47 : x
  2. Step 2: Convert to fraction form
    536.48/740.31 = 315.47/x
  3. Step 3: Cross multiply
    536.48x = 740.31 × 315.47
  4. Step 4: Simplify right side
    536.48x = 233,545.60
  5. Step 5: Solve for x
    x = 233,545.60/536.48
  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.