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Finding the Fourth Proportional to 531.40, 797.48 and 300.74

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Solution

The fourth proportional to 531.40, 797.48 and 300.74 is: 451.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    531.40 : 797.48 = 300.74 : x
  2. Step 2: Convert to fraction form
    531.40/797.48 = 300.74/x
  3. Step 3: Cross multiply
    531.40x = 797.48 × 300.74
  4. Step 4: Simplify right side
    531.40x = 239,829.40
  5. Step 5: Solve for x
    x = 239,829.40/531.40
  6. Step 6: Final answer
    x = 451.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.