Home / 919,987.81-1,380,187.53-280,341.61

Finding the Fourth Proportional to 919,987.81, 1,380,187.53 and 280,341.61

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Solution

The fourth proportional to 919,987.81, 1,380,187.53 and 280,341.61 is: 420,575.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,987.81 : 1,380,187.53 = 280,341.61 : x
  2. Step 2: Convert to fraction form
    919,987.81/1,380,187.53 = 280,341.61/x
  3. Step 3: Cross multiply
    919,987.81x = 1,380,187.53 × 280,341.61
  4. Step 4: Simplify right side
    919,987.81x = 386,923,988,223.80
  5. Step 5: Solve for x
    x = 386,923,988,223.80/919,987.81
  6. Step 6: Final answer
    x = 420,575.13

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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.