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Finding the Fourth Proportional to 2,656.90, 3,985.14 and 925.52

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Solution

The fourth proportional to 2,656.90, 3,985.14 and 925.52 is: 1,388.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,656.90 : 3,985.14 = 925.52 : x
  2. Step 2: Convert to fraction form
    2,656.90/3,985.14 = 925.52/x
  3. Step 3: Cross multiply
    2,656.90x = 3,985.14 × 925.52
  4. Step 4: Simplify right side
    2,656.90x = 3,688,326.77
  5. Step 5: Solve for x
    x = 3,688,326.77/2,656.90
  6. Step 6: Final answer
    x = 1,388.21

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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.