Home / 390,928.77-539,478.05-221,162.89

Finding the Fourth Proportional to 390,928.77, 539,478.05 and 221,162.89

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Solution

The fourth proportional to 390,928.77, 539,478.05 and 221,162.89 is: 305,202.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,928.77 : 539,478.05 = 221,162.89 : x
  2. Step 2: Convert to fraction form
    390,928.77/539,478.05 = 221,162.89/x
  3. Step 3: Cross multiply
    390,928.77x = 539,478.05 × 221,162.89
  4. Step 4: Simplify right side
    390,928.77x = 119,312,525,580.37
  5. Step 5: Solve for x
    x = 119,312,525,580.37/390,928.77
  6. Step 6: Final answer
    x = 305,202.73

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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.