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Finding the Fourth Proportional to 640,567.80, 960,414.30 and 303,769.80

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Solution

The fourth proportional to 640,567.80, 960,414.30 and 303,769.80 is: 455,447.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,567.80 : 960,414.30 = 303,769.80 : x
  2. Step 2: Convert to fraction form
    640,567.80/960,414.30 = 303,769.80/x
  3. Step 3: Cross multiply
    640,567.80x = 960,414.30 × 303,769.80
  4. Step 4: Simplify right side
    640,567.80x = 291,744,859,828.14
  5. Step 5: Solve for x
    x = 291,744,859,828.14/640,567.80
  6. Step 6: Final answer
    x = 455,447.28

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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.