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Finding the Fourth Proportional to 640,113.40, 960,313.08 and 240,757.60

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Solution

The fourth proportional to 640,113.40, 960,313.08 and 240,757.60 is: 361,190.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,113.40 : 960,313.08 = 240,757.60 : x
  2. Step 2: Convert to fraction form
    640,113.40/960,313.08 = 240,757.60/x
  3. Step 3: Cross multiply
    640,113.40x = 960,313.08 × 240,757.60
  4. Step 4: Simplify right side
    640,113.40x = 231,202,672,389.41
  5. Step 5: Solve for x
    x = 231,202,672,389.41/640,113.40
  6. Step 6: Final answer
    x = 361,190.18

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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.