Home / 390,756.47-539,272.89-218,691.68

Finding the Fourth Proportional to 390,756.47, 539,272.89 and 218,691.68

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Solution

The fourth proportional to 390,756.47, 539,272.89 and 218,691.68 is: 301,810.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,756.47 : 539,272.89 = 218,691.68 : x
  2. Step 2: Convert to fraction form
    390,756.47/539,272.89 = 218,691.68/x
  3. Step 3: Cross multiply
    390,756.47x = 539,272.89 × 218,691.68
  4. Step 4: Simplify right side
    390,756.47x = 117,934,494,292.56
  5. Step 5: Solve for x
    x = 117,934,494,292.56/390,756.47
  6. Step 6: Final answer
    x = 301,810.73

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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.