Home / 1,155.28-1,594.32-631.35

Finding the Fourth Proportional to 1,155.28, 1,594.32 and 631.35

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Solution

The fourth proportional to 1,155.28, 1,594.32 and 631.35 is: 871.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,155.28 : 1,594.32 = 631.35 : x
  2. Step 2: Convert to fraction form
    1,155.28/1,594.32 = 631.35/x
  3. Step 3: Cross multiply
    1,155.28x = 1,594.32 × 631.35
  4. Step 4: Simplify right side
    1,155.28x = 1,006,573.93
  5. Step 5: Solve for x
    x = 1,006,573.93/1,155.28
  6. Step 6: Final answer
    x = 871.28

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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.