Home / 1,290.06-1,925.64-1,108.62

Finding the Fourth Proportional to 1,290.06, 1,925.64 and 1,108.62

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Solution

The fourth proportional to 1,290.06, 1,925.64 and 1,108.62 is: 1,654.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290.06 : 1,925.64 = 1,108.62 : x
  2. Step 2: Convert to fraction form
    1,290.06/1,925.64 = 1,108.62/x
  3. Step 3: Cross multiply
    1,290.06x = 1,925.64 × 1,108.62
  4. Step 4: Simplify right side
    1,290.06x = 2,134,803.02
  5. Step 5: Solve for x
    x = 2,134,803.02/1,290.06
  6. Step 6: Final answer
    x = 1,654.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.