Home / 390,928.50-539,477.69-221,162.63

Finding the Fourth Proportional to 390,928.50, 539,477.69 and 221,162.63

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Solution

The fourth proportional to 390,928.50, 539,477.69 and 221,162.63 is: 305,202.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,928.50 : 539,477.69 = 221,162.63 : x
  2. Step 2: Convert to fraction form
    390,928.50/539,477.69 = 221,162.63/x
  3. Step 3: Cross multiply
    390,928.50x = 539,477.69 × 221,162.63
  4. Step 4: Simplify right side
    390,928.50x = 119,312,300,943.52
  5. Step 5: Solve for x
    x = 119,312,300,943.52/390,928.50
  6. Step 6: Final answer
    x = 305,202.36

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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.