Home / 1,555.30-2,145.36-1,031.32

Finding the Fourth Proportional to 1,555.30, 2,145.36 and 1,031.32

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Solution

The fourth proportional to 1,555.30, 2,145.36 and 1,031.32 is: 1,422.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.30 : 2,145.36 = 1,031.32 : x
  2. Step 2: Convert to fraction form
    1,555.30/2,145.36 = 1,031.32/x
  3. Step 3: Cross multiply
    1,555.30x = 2,145.36 × 1,031.32
  4. Step 4: Simplify right side
    1,555.30x = 2,212,552.68
  5. Step 5: Solve for x
    x = 2,212,552.68/1,555.30
  6. Step 6: Final answer
    x = 1,422.59

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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.