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Finding the Fourth Proportional to 557,685.41, 769,603.28 and 315,967.43

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Solution

The fourth proportional to 557,685.41, 769,603.28 and 315,967.43 is: 436,033.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,685.41 : 769,603.28 = 315,967.43 : x
  2. Step 2: Convert to fraction form
    557,685.41/769,603.28 = 315,967.43/x
  3. Step 3: Cross multiply
    557,685.41x = 769,603.28 × 315,967.43
  4. Step 4: Simplify right side
    557,685.41x = 243,169,570,845.34
  5. Step 5: Solve for x
    x = 243,169,570,845.34/557,685.41
  6. Step 6: Final answer
    x = 436,033.59

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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.