Home / 1,438,678.32-1,984,659.53-1,004,007.21

Finding the Fourth Proportional to 1,438,678.32, 1,984,659.53 and 1,004,007.21

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Solution

The fourth proportional to 1,438,678.32, 1,984,659.53 and 1,004,007.21 is: 1,385,029.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438,678.32 : 1,984,659.53 = 1,004,007.21 : x
  2. Step 2: Convert to fraction form
    1,438,678.32/1,984,659.53 = 1,004,007.21/x
  3. Step 3: Cross multiply
    1,438,678.32x = 1,984,659.53 × 1,004,007.21
  4. Step 4: Simplify right side
    1,438,678.32x = 1,992,612,477,515.21
  5. Step 5: Solve for x
    x = 1,992,612,477,515.21/1,438,678.32
  6. Step 6: Final answer
    x = 1,385,029.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.