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Finding the Fourth Proportional to 613,003.68, 918,309.96 and 345,956.40

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Solution

The fourth proportional to 613,003.68, 918,309.96 and 345,956.40 is: 518,259.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,003.68 : 918,309.96 = 345,956.40 : x
  2. Step 2: Convert to fraction form
    613,003.68/918,309.96 = 345,956.40/x
  3. Step 3: Cross multiply
    613,003.68x = 918,309.96 × 345,956.40
  4. Step 4: Simplify right side
    613,003.68x = 317,695,207,845.74
  5. Step 5: Solve for x
    x = 317,695,207,845.74/613,003.68
  6. Step 6: Final answer
    x = 518,259.87

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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.