Home / 390,958.26-539,465.04-218,867.28

Finding the Fourth Proportional to 390,958.26, 539,465.04 and 218,867.28

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Solution

The fourth proportional to 390,958.26, 539,465.04 and 218,867.28 is: 302,004.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,958.26 : 539,465.04 = 218,867.28 : x
  2. Step 2: Convert to fraction form
    390,958.26/539,465.04 = 218,867.28/x
  3. Step 3: Cross multiply
    390,958.26x = 539,465.04 × 218,867.28
  4. Step 4: Simplify right side
    390,958.26x = 118,071,245,959.89
  5. Step 5: Solve for x
    x = 118,071,245,959.89/390,958.26
  6. Step 6: Final answer
    x = 302,004.74

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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.