Home / 390,825.36-539,319.96-221,055.84

Finding the Fourth Proportional to 390,825.36, 539,319.96 and 221,055.84

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Solution

The fourth proportional to 390,825.36, 539,319.96 and 221,055.84 is: 305,046.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,825.36 : 539,319.96 = 221,055.84 : x
  2. Step 2: Convert to fraction form
    390,825.36/539,319.96 = 221,055.84/x
  3. Step 3: Cross multiply
    390,825.36x = 539,319.96 × 221,055.84
  4. Step 4: Simplify right side
    390,825.36x = 119,219,826,786.57
  5. Step 5: Solve for x
    x = 119,219,826,786.57/390,825.36
  6. Step 6: Final answer
    x = 305,046.29

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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.