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Finding the Fourth Proportional to 543.51, 815.16 and 265.58

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Solution

The fourth proportional to 543.51, 815.16 and 265.58 is: 398.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.51 : 815.16 = 265.58 : x
  2. Step 2: Convert to fraction form
    543.51/815.16 = 265.58/x
  3. Step 3: Cross multiply
    543.51x = 815.16 × 265.58
  4. Step 4: Simplify right side
    543.51x = 216,490.19
  5. Step 5: Solve for x
    x = 216,490.19/543.51
  6. Step 6: Final answer
    x = 398.32

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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.