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Finding the Fourth Proportional to 426,076.25, 639,130.57 and 141,792.17

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Solution

The fourth proportional to 426,076.25, 639,130.57 and 141,792.17 is: 212,693.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,076.25 : 639,130.57 = 141,792.17 : x
  2. Step 2: Convert to fraction form
    426,076.25/639,130.57 = 141,792.17/x
  3. Step 3: Cross multiply
    426,076.25x = 639,130.57 × 141,792.17
  4. Step 4: Simplify right side
    426,076.25x = 90,623,706,883.50
  5. Step 5: Solve for x
    x = 90,623,706,883.50/426,076.25
  6. Step 6: Final answer
    x = 212,693.64

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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.