Home / 1,628.15-2,246.85-900.55

Finding the Fourth Proportional to 1,628.15, 2,246.85 and 900.55

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Solution

The fourth proportional to 1,628.15, 2,246.85 and 900.55 is: 1,242.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,628.15 : 2,246.85 = 900.55 : x
  2. Step 2: Convert to fraction form
    1,628.15/2,246.85 = 900.55/x
  3. Step 3: Cross multiply
    1,628.15x = 2,246.85 × 900.55
  4. Step 4: Simplify right side
    1,628.15x = 2,023,389.53
  5. Step 5: Solve for x
    x = 2,023,389.53/1,628.15
  6. Step 6: Final answer
    x = 1,242.75

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1.5x scale

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.