Home / 390,926.22-539,448.38-218,804.76

Finding the Fourth Proportional to 390,926.22, 539,448.38 and 218,804.76

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Solution

The fourth proportional to 390,926.22, 539,448.38 and 218,804.76 is: 301,933.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,926.22 : 539,448.38 = 218,804.76 : x
  2. Step 2: Convert to fraction form
    390,926.22/539,448.38 = 218,804.76/x
  3. Step 3: Cross multiply
    390,926.22x = 539,448.38 × 218,804.76
  4. Step 4: Simplify right side
    390,926.22x = 118,033,873,318.29
  5. Step 5: Solve for x
    x = 118,033,873,318.29/390,926.22
  6. Step 6: Final answer
    x = 301,933.89

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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.