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Finding the Fourth Proportional to 689,617.72, 951,657.55 and 399,241.59

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Solution

The fourth proportional to 689,617.72, 951,657.55 and 399,241.59 is: 550,944.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,617.72 : 951,657.55 = 399,241.59 : x
  2. Step 2: Convert to fraction form
    689,617.72/951,657.55 = 399,241.59/x
  3. Step 3: Cross multiply
    689,617.72x = 951,657.55 × 399,241.59
  4. Step 4: Simplify right side
    689,617.72x = 379,941,272,399.40
  5. Step 5: Solve for x
    x = 379,941,272,399.40/689,617.72
  6. Step 6: Final answer
    x = 550,944.77

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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.