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Finding the Fourth Proportional to 555.12, 765.94 and 358.60

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Solution

The fourth proportional to 555.12, 765.94 and 358.60 is: 494.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    555.12 : 765.94 = 358.60 : x
  2. Step 2: Convert to fraction form
    555.12/765.94 = 358.60/x
  3. Step 3: Cross multiply
    555.12x = 765.94 × 358.60
  4. Step 4: Simplify right side
    555.12x = 274,666.08
  5. Step 5: Solve for x
    x = 274,666.08/555.12
  6. Step 6: Final answer
    x = 494.79

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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.