Home / 1,555.96-2,139.86-1,237.48

Finding the Fourth Proportional to 1,555.96, 2,139.86 and 1,237.48

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Solution

The fourth proportional to 1,555.96, 2,139.86 and 1,237.48 is: 1,701.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.96 : 2,139.86 = 1,237.48 : x
  2. Step 2: Convert to fraction form
    1,555.96/2,139.86 = 1,237.48/x
  3. Step 3: Cross multiply
    1,555.96x = 2,139.86 × 1,237.48
  4. Step 4: Simplify right side
    1,555.96x = 2,648,031.70
  5. Step 5: Solve for x
    x = 2,648,031.70/1,555.96
  6. Step 6: Final answer
    x = 1,701.87

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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.