Home / 1,326.46-1,985.58-1,129.63

Finding the Fourth Proportional to 1,326.46, 1,985.58 and 1,129.63

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Solution

The fourth proportional to 1,326.46, 1,985.58 and 1,129.63 is: 1,690.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326.46 : 1,985.58 = 1,129.63 : x
  2. Step 2: Convert to fraction form
    1,326.46/1,985.58 = 1,129.63/x
  3. Step 3: Cross multiply
    1,326.46x = 1,985.58 × 1,129.63
  4. Step 4: Simplify right side
    1,326.46x = 2,242,965.77
  5. Step 5: Solve for x
    x = 2,242,965.77/1,326.46
  6. Step 6: Final answer
    x = 1,690.94

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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.