Home / 1,113.35-1,669.56-419.66

Finding the Fourth Proportional to 1,113.35, 1,669.56 and 419.66

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Solution

The fourth proportional to 1,113.35, 1,669.56 and 419.66 is: 629.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,113.35 : 1,669.56 = 419.66 : x
  2. Step 2: Convert to fraction form
    1,113.35/1,669.56 = 419.66/x
  3. Step 3: Cross multiply
    1,113.35x = 1,669.56 × 419.66
  4. Step 4: Simplify right side
    1,113.35x = 700,641.55
  5. Step 5: Solve for x
    x = 700,641.55/1,113.35
  6. Step 6: Final answer
    x = 629.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.