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Finding the Fourth Proportional to 485,988.48, 670,654.71 and 268,217.64

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Solution

The fourth proportional to 485,988.48, 670,654.71 and 268,217.64 is: 370,135.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,988.48 : 670,654.71 = 268,217.64 : x
  2. Step 2: Convert to fraction form
    485,988.48/670,654.71 = 268,217.64/x
  3. Step 3: Cross multiply
    485,988.48x = 670,654.71 × 268,217.64
  4. Step 4: Simplify right side
    485,988.48x = 179,881,423,571.08
  5. Step 5: Solve for x
    x = 179,881,423,571.08/485,988.48
  6. Step 6: Final answer
    x = 370,135.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.