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Finding the Fourth Proportional to 445,661.84, 668,421.12 and 130,044.80

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Solution

The fourth proportional to 445,661.84, 668,421.12 and 130,044.80 is: 195,046.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,661.84 : 668,421.12 = 130,044.80 : x
  2. Step 2: Convert to fraction form
    445,661.84/668,421.12 = 130,044.80/x
  3. Step 3: Cross multiply
    445,661.84x = 668,421.12 × 130,044.80
  4. Step 4: Simplify right side
    445,661.84x = 86,924,690,866.18
  5. Step 5: Solve for x
    x = 86,924,690,866.18/445,661.84
  6. Step 6: Final answer
    x = 195,046.30

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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.