Home / 1,401.05-2,101.53-578.70

Finding the Fourth Proportional to 1,401.05, 2,101.53 and 578.70

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Solution

The fourth proportional to 1,401.05, 2,101.53 and 578.70 is: 868.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,401.05 : 2,101.53 = 578.70 : x
  2. Step 2: Convert to fraction form
    1,401.05/2,101.53 = 578.70/x
  3. Step 3: Cross multiply
    1,401.05x = 2,101.53 × 578.70
  4. Step 4: Simplify right side
    1,401.05x = 1,216,155.41
  5. Step 5: Solve for x
    x = 1,216,155.41/1,401.05
  6. Step 6: Final answer
    x = 868.03

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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.