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Finding the Fourth Proportional to 377,407.78, 520,822.71 and 207,638.26

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Solution

The fourth proportional to 377,407.78, 520,822.71 and 207,638.26 is: 286,540.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    377,407.78 : 520,822.71 = 207,638.26 : x
  2. Step 2: Convert to fraction form
    377,407.78/520,822.71 = 207,638.26/x
  3. Step 3: Cross multiply
    377,407.78x = 520,822.71 × 207,638.26
  4. Step 4: Simplify right side
    377,407.78x = 108,142,721,272.89
  5. Step 5: Solve for x
    x = 108,142,721,272.89/377,407.78
  6. Step 6: Final answer
    x = 286,540.78

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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.