Home / 679,439.70-1,019,937.15-399,114.90

Finding the Fourth Proportional to 679,439.70, 1,019,937.15 and 399,114.90

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Solution

The fourth proportional to 679,439.70, 1,019,937.15 and 399,114.90 is: 599,129.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,439.70 : 1,019,937.15 = 399,114.90 : x
  2. Step 2: Convert to fraction form
    679,439.70/1,019,937.15 = 399,114.90/x
  3. Step 3: Cross multiply
    679,439.70x = 1,019,937.15 × 399,114.90
  4. Step 4: Simplify right side
    679,439.70x = 407,072,113,628.54
  5. Step 5: Solve for x
    x = 407,072,113,628.54/679,439.70
  6. Step 6: Final answer
    x = 599,129.13

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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.