Home / 819,145.42-1,228,717.04-380,921.64

Finding the Fourth Proportional to 819,145.42, 1,228,717.04 and 380,921.64

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Solution

The fourth proportional to 819,145.42, 1,228,717.04 and 380,921.64 is: 571,381.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,145.42 : 1,228,717.04 = 380,921.64 : x
  2. Step 2: Convert to fraction form
    819,145.42/1,228,717.04 = 380,921.64/x
  3. Step 3: Cross multiply
    819,145.42x = 1,228,717.04 × 380,921.64
  4. Step 4: Simplify right side
    819,145.42x = 468,044,909,972.75
  5. Step 5: Solve for x
    x = 468,044,909,972.75/819,145.42
  6. Step 6: Final answer
    x = 571,381.95

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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.