Home / 1,555.85-2,147.15-1,031.51

Finding the Fourth Proportional to 1,555.85, 2,147.15 and 1,031.51

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Solution

The fourth proportional to 1,555.85, 2,147.15 and 1,031.51 is: 1,423.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.85 : 2,147.15 = 1,031.51 : x
  2. Step 2: Convert to fraction form
    1,555.85/2,147.15 = 1,031.51/x
  3. Step 3: Cross multiply
    1,555.85x = 2,147.15 × 1,031.51
  4. Step 4: Simplify right side
    1,555.85x = 2,214,806.70
  5. Step 5: Solve for x
    x = 2,214,806.70/1,555.85
  6. Step 6: Final answer
    x = 1,423.53

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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.