Home / 1,424.30-2,137.77-877.55

Finding the Fourth Proportional to 1,424.30, 2,137.77 and 877.55

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Solution

The fourth proportional to 1,424.30, 2,137.77 and 877.55 is: 1,317.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.30 : 2,137.77 = 877.55 : x
  2. Step 2: Convert to fraction form
    1,424.30/2,137.77 = 877.55/x
  3. Step 3: Cross multiply
    1,424.30x = 2,137.77 × 877.55
  4. Step 4: Simplify right side
    1,424.30x = 1,875,989.37
  5. Step 5: Solve for x
    x = 1,875,989.37/1,424.30
  6. Step 6: Final answer
    x = 1,317.14

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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.