Home / 1,401.42-2,102.15-917.55

Finding the Fourth Proportional to 1,401.42, 2,102.15 and 917.55

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Solution

The fourth proportional to 1,401.42, 2,102.15 and 917.55 is: 1,376.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.42 : 2,102.15 = 917.55 : x
  2. Step 2: Convert to fraction form
    1,401.42/2,102.15 = 917.55/x
  3. Step 3: Cross multiply
    1,401.42x = 2,102.15 × 917.55
  4. Step 4: Simplify right side
    1,401.42x = 1,928,823.14
  5. Step 5: Solve for x
    x = 1,928,823.14/1,401.42
  6. Step 6: Final answer
    x = 1,376.33

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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.