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Finding the Fourth Proportional to 557,761.32, 769,615.56 and 315,993.96

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Solution

The fourth proportional to 557,761.32, 769,615.56 and 315,993.96 is: 436,017.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    557,761.32 : 769,615.56 = 315,993.96 : x
  2. Step 2: Convert to fraction form
    557,761.32/769,615.56 = 315,993.96/x
  3. Step 3: Cross multiply
    557,761.32x = 769,615.56 × 315,993.96
  4. Step 4: Simplify right side
    557,761.32x = 243,193,868,482.02
  5. Step 5: Solve for x
    x = 243,193,868,482.02/557,761.32
  6. Step 6: Final answer
    x = 436,017.81

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1.5x scale

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.