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Finding the Fourth Proportional to 1,297.32, 1,790.15 and 925.07

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Solution

The fourth proportional to 1,297.32, 1,790.15 and 925.07 is: 1,276.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,297.32 : 1,790.15 = 925.07 : x
  2. Step 2: Convert to fraction form
    1,297.32/1,790.15 = 925.07/x
  3. Step 3: Cross multiply
    1,297.32x = 1,790.15 × 925.07
  4. Step 4: Simplify right side
    1,297.32x = 1,656,015.76
  5. Step 5: Solve for x
    x = 1,656,015.76/1,297.32
  6. Step 6: Final answer
    x = 1,276.49

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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.