Home / 878,740.80-1,318,111.20-519,489.60

Finding the Fourth Proportional to 878,740.80, 1,318,111.20 and 519,489.60

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Solution

The fourth proportional to 878,740.80, 1,318,111.20 and 519,489.60 is: 779,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,740.80 : 1,318,111.20 = 519,489.60 : x
  2. Step 2: Convert to fraction form
    878,740.80/1,318,111.20 = 519,489.60/x
  3. Step 3: Cross multiply
    878,740.80x = 1,318,111.20 × 519,489.60
  4. Step 4: Simplify right side
    878,740.80x = 684,745,060,043.52
  5. Step 5: Solve for x
    x = 684,745,060,043.52/878,740.80
  6. Step 6: Final answer
    x = 779,234.40

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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.