Home / 1,340,039.20-2,009,864.40-393,311.20

Finding the Fourth Proportional to 1,340,039.20, 2,009,864.40 and 393,311.20

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Solution

The fourth proportional to 1,340,039.20, 2,009,864.40 and 393,311.20 is: 589,909.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,340,039.20 : 2,009,864.40 = 393,311.20 : x
  2. Step 2: Convert to fraction form
    1,340,039.20/2,009,864.40 = 393,311.20/x
  3. Step 3: Cross multiply
    1,340,039.20x = 2,009,864.40 × 393,311.20
  4. Step 4: Simplify right side
    1,340,039.20x = 790,502,179,001.28
  5. Step 5: Solve for x
    x = 790,502,179,001.28/1,340,039.20
  6. Step 6: Final answer
    x = 589,909.74

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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.