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Finding the Fourth Proportional to 536.47, 740.40 and 315.34

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Solution

The fourth proportional to 536.47, 740.40 and 315.34 is: 435.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    536.47 : 740.40 = 315.34 : x
  2. Step 2: Convert to fraction form
    536.47/740.40 = 315.34/x
  3. Step 3: Cross multiply
    536.47x = 740.40 × 315.34
  4. Step 4: Simplify right side
    536.47x = 233,477.74
  5. Step 5: Solve for x
    x = 233,477.74/536.47
  6. Step 6: Final answer
    x = 435.21

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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.