Home / 742,915.28-1,021,280.26-639,171.92

Finding the Fourth Proportional to 742,915.28, 1,021,280.26 and 639,171.92

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Solution

The fourth proportional to 742,915.28, 1,021,280.26 and 639,171.92 is: 878,665.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,915.28 : 1,021,280.26 = 639,171.92 : x
  2. Step 2: Convert to fraction form
    742,915.28/1,021,280.26 = 639,171.92/x
  3. Step 3: Cross multiply
    742,915.28x = 1,021,280.26 × 639,171.92
  4. Step 4: Simplify right side
    742,915.28x = 652,773,664,642.30
  5. Step 5: Solve for x
    x = 652,773,664,642.30/742,915.28
  6. Step 6: Final answer
    x = 878,665.01

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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.