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Finding the Fourth Proportional to 640,792.68, 960,084.36 and 424,516.56

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Solution

The fourth proportional to 640,792.68, 960,084.36 and 424,516.56 is: 636,043.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,792.68 : 960,084.36 = 424,516.56 : x
  2. Step 2: Convert to fraction form
    640,792.68/960,084.36 = 424,516.56/x
  3. Step 3: Cross multiply
    640,792.68x = 960,084.36 × 424,516.56
  4. Step 4: Simplify right side
    640,792.68x = 407,571,709,817.00
  5. Step 5: Solve for x
    x = 407,571,709,817.00/640,792.68
  6. Step 6: Final answer
    x = 636,043.02

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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.