Home / 390,977.04-539,402.76-221,083.92

Finding the Fourth Proportional to 390,977.04, 539,402.76 and 221,083.92

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Solution

The fourth proportional to 390,977.04, 539,402.76 and 221,083.92 is: 305,013.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,977.04 : 539,402.76 = 221,083.92 : x
  2. Step 2: Convert to fraction form
    390,977.04/539,402.76 = 221,083.92/x
  3. Step 3: Cross multiply
    390,977.04x = 539,402.76 × 221,083.92
  4. Step 4: Simplify right side
    390,977.04x = 119,253,276,639.62
  5. Step 5: Solve for x
    x = 119,253,276,639.62/390,977.04
  6. Step 6: Final answer
    x = 305,013.50

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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.