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Finding the Fourth Proportional to 702,988.80, 970,122.60 and 380,698.80

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Solution

The fourth proportional to 702,988.80, 970,122.60 and 380,698.80 is: 525,363.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,988.80 : 970,122.60 = 380,698.80 : x
  2. Step 2: Convert to fraction form
    702,988.80/970,122.60 = 380,698.80/x
  3. Step 3: Cross multiply
    702,988.80x = 970,122.60 × 380,698.80
  4. Step 4: Simplify right side
    702,988.80x = 369,324,509,672.88
  5. Step 5: Solve for x
    x = 369,324,509,672.88/702,988.80
  6. Step 6: Final answer
    x = 525,363.29

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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.