Home / 427,309,338.40-640,964,007.60-154,581,690.40

Finding the Fourth Proportional to 427,309,338.40, 640,964,007.60 and 154,581,690.40

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Solution

The fourth proportional to 427,309,338.40, 640,964,007.60 and 154,581,690.40 is: 231,872,535.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,309,338.40 : 640,964,007.60 = 154,581,690.40 : x
  2. Step 2: Convert to fraction form
    427,309,338.40/640,964,007.60 = 154,581,690.40/x
  3. Step 3: Cross multiply
    427,309,338.40x = 640,964,007.60 × 154,581,690.40
  4. Step 4: Simplify right side
    427,309,338.40x = 99,081,299,780,366,448
  5. Step 5: Solve for x
    x = 99,081,299,780,366,448/427,309,338.40
  6. Step 6: Final answer
    x = 231,872,535.60

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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.