Home / 1,155.40-1,594.46-631.43

Finding the Fourth Proportional to 1,155.40, 1,594.46 and 631.43

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Solution

The fourth proportional to 1,155.40, 1,594.46 and 631.43 is: 871.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.40 : 1,594.46 = 631.43 : x
  2. Step 2: Convert to fraction form
    1,155.40/1,594.46 = 631.43/x
  3. Step 3: Cross multiply
    1,155.40x = 1,594.46 × 631.43
  4. Step 4: Simplify right side
    1,155.40x = 1,006,789.88
  5. Step 5: Solve for x
    x = 1,006,789.88/1,155.40
  6. Step 6: Final answer
    x = 871.38

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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.