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Finding the Fourth Proportional to 611,944.88, 918,015.66 and 257,060.39

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Solution

The fourth proportional to 611,944.88, 918,015.66 and 257,060.39 is: 385,631.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,944.88 : 918,015.66 = 257,060.39 : x
  2. Step 2: Convert to fraction form
    611,944.88/918,015.66 = 257,060.39/x
  3. Step 3: Cross multiply
    611,944.88x = 918,015.66 × 257,060.39
  4. Step 4: Simplify right side
    611,944.88x = 235,985,458,995.63
  5. Step 5: Solve for x
    x = 235,985,458,995.63/611,944.88
  6. Step 6: Final answer
    x = 385,631.89

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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.