Home / 390,619,213.08-539,501,902.29-257,253,305.46

Finding the Fourth Proportional to 390,619,213.08, 539,501,902.29 and 257,253,305.46

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Solution

The fourth proportional to 390,619,213.08, 539,501,902.29 and 257,253,305.46 is: 355,304,201.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,619,213.08 : 539,501,902.29 = 257,253,305.46 : x
  2. Step 2: Convert to fraction form
    390,619,213.08/539,501,902.29 = 257,253,305.46/x
  3. Step 3: Cross multiply
    390,619,213.08x = 539,501,902.29 × 257,253,305.46
  4. Step 4: Simplify right side
    390,619,213.08x = 138,788,647,666,060,432
  5. Step 5: Solve for x
    x = 138,788,647,666,060,432/390,619,213.08
  6. Step 6: Final answer
    x = 355,304,201.68

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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.