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Finding the Fourth Proportional to 645,781.56, 968,662.60 and 290,544.72

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Solution

The fourth proportional to 645,781.56, 968,662.60 and 290,544.72 is: 435,812.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,781.56 : 968,662.60 = 290,544.72 : x
  2. Step 2: Convert to fraction form
    645,781.56/968,662.60 = 290,544.72/x
  3. Step 3: Cross multiply
    645,781.56x = 968,662.60 × 290,544.72
  4. Step 4: Simplify right side
    645,781.56x = 281,439,803,891.47
  5. Step 5: Solve for x
    x = 281,439,803,891.47/645,781.56
  6. Step 6: Final answer
    x = 435,812.70

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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.