Home / 728.16-1,091.93-357.78

Finding the Fourth Proportional to 728.16, 1,091.93 and 357.78

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Solution

The fourth proportional to 728.16, 1,091.93 and 357.78 is: 536.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    728.16 : 1,091.93 = 357.78 : x
  2. Step 2: Convert to fraction form
    728.16/1,091.93 = 357.78/x
  3. Step 3: Cross multiply
    728.16x = 1,091.93 × 357.78
  4. Step 4: Simplify right side
    728.16x = 390,668.93
  5. Step 5: Solve for x
    x = 390,668.93/728.16
  6. Step 6: Final answer
    x = 536.52

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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.