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Finding the Fourth Proportional to 3,390.62, 5,085.93 and 925.51

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Solution

The fourth proportional to 3,390.62, 5,085.93 and 925.51 is: 1,388.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.62 : 5,085.93 = 925.51 : x
  2. Step 2: Convert to fraction form
    3,390.62/5,085.93 = 925.51/x
  3. Step 3: Cross multiply
    3,390.62x = 5,085.93 × 925.51
  4. Step 4: Simplify right side
    3,390.62x = 4,707,057.40
  5. Step 5: Solve for x
    x = 4,707,057.40/3,390.62
  6. Step 6: Final answer
    x = 1,388.26

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1.5x scale

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.