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Finding the Fourth Proportional to 640,506.76, 960,738.36 and 303,708.76

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Solution

The fourth proportional to 640,506.76, 960,738.36 and 303,708.76 is: 455,552.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,506.76 : 960,738.36 = 303,708.76 : x
  2. Step 2: Convert to fraction form
    640,506.76/960,738.36 = 303,708.76/x
  3. Step 3: Cross multiply
    640,506.76x = 960,738.36 × 303,708.76
  4. Step 4: Simplify right side
    640,506.76x = 291,784,656,000.03
  5. Step 5: Solve for x
    x = 291,784,656,000.03/640,506.76
  6. Step 6: Final answer
    x = 455,552.81

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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.