Home / 1,178.65-1,621.82-1,146.35

Finding the Fourth Proportional to 1,178.65, 1,621.82 and 1,146.35

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Solution

The fourth proportional to 1,178.65, 1,621.82 and 1,146.35 is: 1,577.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,178.65 : 1,621.82 = 1,146.35 : x
  2. Step 2: Convert to fraction form
    1,178.65/1,621.82 = 1,146.35/x
  3. Step 3: Cross multiply
    1,178.65x = 1,621.82 × 1,146.35
  4. Step 4: Simplify right side
    1,178.65x = 1,859,180.28
  5. Step 5: Solve for x
    x = 1,859,180.28/1,178.65
  6. Step 6: Final answer
    x = 1,577.38

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1.5x scale

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.