Home / 666,923.10-999,072.45-399,890.40

Finding the Fourth Proportional to 666,923.10, 999,072.45 and 399,890.40

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Solution

The fourth proportional to 666,923.10, 999,072.45 and 399,890.40 is: 599,048.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,923.10 : 999,072.45 = 399,890.40 : x
  2. Step 2: Convert to fraction form
    666,923.10/999,072.45 = 399,890.40/x
  3. Step 3: Cross multiply
    666,923.10x = 999,072.45 × 399,890.40
  4. Step 4: Simplify right side
    666,923.10x = 399,519,481,659.48
  5. Step 5: Solve for x
    x = 399,519,481,659.48/666,923.10
  6. Step 6: Final answer
    x = 599,048.80

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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.