Home / 390,934.08-539,539.89-218,917.56

Finding the Fourth Proportional to 390,934.08, 539,539.89 and 218,917.56

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Solution

The fourth proportional to 390,934.08, 539,539.89 and 218,917.56 is: 302,134.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,934.08 : 539,539.89 = 218,917.56 : x
  2. Step 2: Convert to fraction form
    390,934.08/539,539.89 = 218,917.56/x
  3. Step 3: Cross multiply
    390,934.08x = 539,539.89 × 218,917.56
  4. Step 4: Simplify right side
    390,934.08x = 118,114,756,241.47
  5. Step 5: Solve for x
    x = 118,114,756,241.47/390,934.08
  6. Step 6: Final answer
    x = 302,134.71

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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.