Home / 859,416.80-1,288,274.70-379,904.90

Finding the Fourth Proportional to 859,416.80, 1,288,274.70 and 379,904.90

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Solution

The fourth proportional to 859,416.80, 1,288,274.70 and 379,904.90 is: 569,481.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    859,416.80 : 1,288,274.70 = 379,904.90 : x
  2. Step 2: Convert to fraction form
    859,416.80/1,288,274.70 = 379,904.90/x
  3. Step 3: Cross multiply
    859,416.80x = 1,288,274.70 × 379,904.90
  4. Step 4: Simplify right side
    859,416.80x = 489,421,871,076.03
  5. Step 5: Solve for x
    x = 489,421,871,076.03/859,416.80
  6. Step 6: Final answer
    x = 569,481.39

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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.