Home / 1,326,785.40-1,990,178.10-485,422.20

Finding the Fourth Proportional to 1,326,785.40, 1,990,178.10 and 485,422.20

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Solution

The fourth proportional to 1,326,785.40, 1,990,178.10 and 485,422.20 is: 728,133.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,326,785.40 : 1,990,178.10 = 485,422.20 : x
  2. Step 2: Convert to fraction form
    1,326,785.40/1,990,178.10 = 485,422.20/x
  3. Step 3: Cross multiply
    1,326,785.40x = 1,990,178.10 × 485,422.20
  4. Step 4: Simplify right side
    1,326,785.40x = 966,076,631,693.82
  5. Step 5: Solve for x
    x = 966,076,631,693.82/1,326,785.40
  6. Step 6: Final answer
    x = 728,133.30

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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.