Home / 1,535.20-2,118.64-914.08

Finding the Fourth Proportional to 1,535.20, 2,118.64 and 914.08

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Solution

The fourth proportional to 1,535.20, 2,118.64 and 914.08 is: 1,261.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,535.20 : 2,118.64 = 914.08 : x
  2. Step 2: Convert to fraction form
    1,535.20/2,118.64 = 914.08/x
  3. Step 3: Cross multiply
    1,535.20x = 2,118.64 × 914.08
  4. Step 4: Simplify right side
    1,535.20x = 1,936,606.45
  5. Step 5: Solve for x
    x = 1,936,606.45/1,535.20
  6. Step 6: Final answer
    x = 1,261.47

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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.