Home / 1,611.04-2,223.28-912.40

Finding the Fourth Proportional to 1,611.04, 2,223.28 and 912.40

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Solution

The fourth proportional to 1,611.04, 2,223.28 and 912.40 is: 1,259.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.04 : 2,223.28 = 912.40 : x
  2. Step 2: Convert to fraction form
    1,611.04/2,223.28 = 912.40/x
  3. Step 3: Cross multiply
    1,611.04x = 2,223.28 × 912.40
  4. Step 4: Simplify right side
    1,611.04x = 2,028,520.67
  5. Step 5: Solve for x
    x = 2,028,520.67/1,611.04
  6. Step 6: Final answer
    x = 1,259.14

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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.