Home / 3,215.78-4,437.71-1,818.53

Finding the Fourth Proportional to 3,215.78, 4,437.71 and 1,818.53

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Solution

The fourth proportional to 3,215.78, 4,437.71 and 1,818.53 is: 2,509.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.78 : 4,437.71 = 1,818.53 : x
  2. Step 2: Convert to fraction form
    3,215.78/4,437.71 = 1,818.53/x
  3. Step 3: Cross multiply
    3,215.78x = 4,437.71 × 1,818.53
  4. Step 4: Simplify right side
    3,215.78x = 8,070,108.77
  5. Step 5: Solve for x
    x = 8,070,108.77/3,215.78
  6. Step 6: Final answer
    x = 2,509.53

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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.