Home / 390,619,122.54-539,501,777.28-257,253,215.46

Finding the Fourth Proportional to 390,619,122.54, 539,501,777.28 and 257,253,215.46

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Solution

The fourth proportional to 390,619,122.54, 539,501,777.28 and 257,253,215.46 is: 355,304,077.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,619,122.54 : 539,501,777.28 = 257,253,215.46 : x
  2. Step 2: Convert to fraction form
    390,619,122.54/539,501,777.28 = 257,253,215.46/x
  3. Step 3: Cross multiply
    390,619,122.54x = 539,501,777.28 × 257,253,215.46
  4. Step 4: Simplify right side
    390,619,122.54x = 138,788,566,951,664,768
  5. Step 5: Solve for x
    x = 138,788,566,951,664,768/390,619,122.54
  6. Step 6: Final answer
    x = 355,304,077.41

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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.