Home / 742,914.28-1,021,278.89-639,170.92

Finding the Fourth Proportional to 742,914.28, 1,021,278.89 and 639,170.92

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Solution

The fourth proportional to 742,914.28, 1,021,278.89 and 639,170.92 is: 878,663.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,914.28 : 1,021,278.89 = 639,170.92 : x
  2. Step 2: Convert to fraction form
    742,914.28/1,021,278.89 = 639,170.92/x
  3. Step 3: Cross multiply
    742,914.28x = 1,021,278.89 × 639,170.92
  4. Step 4: Simplify right side
    742,914.28x = 652,771,767,697.88
  5. Step 5: Solve for x
    x = 652,771,767,697.88/742,914.28
  6. Step 6: Final answer
    x = 878,663.64

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.