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Finding the Fourth Proportional to 1,369.45, 2,055.32 and 711.73

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Solution

The fourth proportional to 1,369.45, 2,055.32 and 711.73 is: 1,068.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,369.45 : 2,055.32 = 711.73 : x
  2. Step 2: Convert to fraction form
    1,369.45/2,055.32 = 711.73/x
  3. Step 3: Cross multiply
    1,369.45x = 2,055.32 × 711.73
  4. Step 4: Simplify right side
    1,369.45x = 1,462,832.90
  5. Step 5: Solve for x
    x = 1,462,832.90/1,369.45
  6. Step 6: Final answer
    x = 1,068.19

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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.