Home / 916,520.40-1,374,910.20-285,368.40

Finding the Fourth Proportional to 916,520.40, 1,374,910.20 and 285,368.40

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Solution

The fourth proportional to 916,520.40, 1,374,910.20 and 285,368.40 is: 428,092.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    916,520.40 : 1,374,910.20 = 285,368.40 : x
  2. Step 2: Convert to fraction form
    916,520.40/1,374,910.20 = 285,368.40/x
  3. Step 3: Cross multiply
    916,520.40x = 1,374,910.20 × 285,368.40
  4. Step 4: Simplify right side
    916,520.40x = 392,355,923,917.68
  5. Step 5: Solve for x
    x = 392,355,923,917.68/916,520.40
  6. Step 6: Final answer
    x = 428,092.95

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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.