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Finding the Fourth Proportional to 640,157.13, 960,378.57 and 240,801.21

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Solution

The fourth proportional to 640,157.13, 960,378.57 and 240,801.21 is: 361,255.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,157.13 : 960,378.57 = 240,801.21 : x
  2. Step 2: Convert to fraction form
    640,157.13/960,378.57 = 240,801.21/x
  3. Step 3: Cross multiply
    640,157.13x = 960,378.57 × 240,801.21
  4. Step 4: Simplify right side
    640,157.13x = 231,260,321,714.07
  5. Step 5: Solve for x
    x = 231,260,321,714.07/640,157.13
  6. Step 6: Final answer
    x = 361,255.56

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1.5x scale

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.