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Finding the Fourth Proportional to 469,905.78, 648,470.62 and 255,045.80

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Solution

The fourth proportional to 469,905.78, 648,470.62 and 255,045.80 is: 351,963.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    469,905.78 : 648,470.62 = 255,045.80 : x
  2. Step 2: Convert to fraction form
    469,905.78/648,470.62 = 255,045.80/x
  3. Step 3: Cross multiply
    469,905.78x = 648,470.62 × 255,045.80
  4. Step 4: Simplify right side
    469,905.78x = 165,389,708,054.40
  5. Step 5: Solve for x
    x = 165,389,708,054.40/469,905.78
  6. Step 6: Final answer
    x = 351,963.55

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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.