Home / 2,015.31-2,780.67-1,543.77

Finding the Fourth Proportional to 2,015.31, 2,780.67 and 1,543.77

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Solution

The fourth proportional to 2,015.31, 2,780.67 and 1,543.77 is: 2,130.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.31 : 2,780.67 = 1,543.77 : x
  2. Step 2: Convert to fraction form
    2,015.31/2,780.67 = 1,543.77/x
  3. Step 3: Cross multiply
    2,015.31x = 2,780.67 × 1,543.77
  4. Step 4: Simplify right side
    2,015.31x = 4,292,714.93
  5. Step 5: Solve for x
    x = 4,292,714.93/2,015.31
  6. Step 6: Final answer
    x = 2,130.05

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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.