Home / 578,990.40-867,967.20-379,406.40

Finding the Fourth Proportional to 578,990.40, 867,967.20 and 379,406.40

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Solution

The fourth proportional to 578,990.40, 867,967.20 and 379,406.40 is: 568,769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,990.40 : 867,967.20 = 379,406.40 : x
  2. Step 2: Convert to fraction form
    578,990.40/867,967.20 = 379,406.40/x
  3. Step 3: Cross multiply
    578,990.40x = 867,967.20 × 379,406.40
  4. Step 4: Simplify right side
    578,990.40x = 329,312,310,670.08
  5. Step 5: Solve for x
    x = 329,312,310,670.08/578,990.40
  6. Step 6: Final answer
    x = 568,769.90

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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.