Home / 1,583.52-2,185.20-1,118.40

Finding the Fourth Proportional to 1,583.52, 2,185.20 and 1,118.40

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Solution

The fourth proportional to 1,583.52, 2,185.20 and 1,118.40 is: 1,543.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,583.52 : 2,185.20 = 1,118.40 : x
  2. Step 2: Convert to fraction form
    1,583.52/2,185.20 = 1,118.40/x
  3. Step 3: Cross multiply
    1,583.52x = 2,185.20 × 1,118.40
  4. Step 4: Simplify right side
    1,583.52x = 2,443,927.68
  5. Step 5: Solve for x
    x = 2,443,927.68/1,583.52
  6. Step 6: Final answer
    x = 1,543.35

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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.