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Finding the Fourth Proportional to 518,708.70, 778,062.78 and 163,971.72

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Solution

The fourth proportional to 518,708.70, 778,062.78 and 163,971.72 is: 245,957.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,708.70 : 778,062.78 = 163,971.72 : x
  2. Step 2: Convert to fraction form
    518,708.70/778,062.78 = 163,971.72/x
  3. Step 3: Cross multiply
    518,708.70x = 778,062.78 × 163,971.72
  4. Step 4: Simplify right side
    518,708.70x = 127,580,292,304.58
  5. Step 5: Solve for x
    x = 127,580,292,304.58/518,708.70
  6. Step 6: Final answer
    x = 245,957.49

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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.