Home / 1,535.08-2,118.36-871.98

Finding the Fourth Proportional to 1,535.08, 2,118.36 and 871.98

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Solution

The fourth proportional to 1,535.08, 2,118.36 and 871.98 is: 1,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.08 : 2,118.36 = 871.98 : x
  2. Step 2: Convert to fraction form
    1,535.08/2,118.36 = 871.98/x
  3. Step 3: Cross multiply
    1,535.08x = 2,118.36 × 871.98
  4. Step 4: Simplify right side
    1,535.08x = 1,847,167.55
  5. Step 5: Solve for x
    x = 1,847,167.55/1,535.08
  6. Step 6: Final answer
    x = 1,203.30

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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.