Home / 1,142.35-1,583.08-1,120.48

Finding the Fourth Proportional to 1,142.35, 1,583.08 and 1,120.48

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Solution

The fourth proportional to 1,142.35, 1,583.08 and 1,120.48 is: 1,552.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.35 : 1,583.08 = 1,120.48 : x
  2. Step 2: Convert to fraction form
    1,142.35/1,583.08 = 1,120.48/x
  3. Step 3: Cross multiply
    1,142.35x = 1,583.08 × 1,120.48
  4. Step 4: Simplify right side
    1,142.35x = 1,773,809.48
  5. Step 5: Solve for x
    x = 1,773,809.48/1,142.35
  6. Step 6: Final answer
    x = 1,552.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.