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Finding the Fourth Proportional to 386,446.90, 579,670.35 and 105,963.70

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Solution

The fourth proportional to 386,446.90, 579,670.35 and 105,963.70 is: 158,945.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,446.90 : 579,670.35 = 105,963.70 : x
  2. Step 2: Convert to fraction form
    386,446.90/579,670.35 = 105,963.70/x
  3. Step 3: Cross multiply
    386,446.90x = 579,670.35 × 105,963.70
  4. Step 4: Simplify right side
    386,446.90x = 61,424,015,066.30
  5. Step 5: Solve for x
    x = 61,424,015,066.30/386,446.90
  6. Step 6: Final answer
    x = 158,945.55

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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.