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Finding the Fourth Proportional to 390,609.96, 539,056.26 and 220,833.96

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Solution

The fourth proportional to 390,609.96, 539,056.26 and 220,833.96 is: 304,759.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,609.96 : 539,056.26 = 220,833.96 : x
  2. Step 2: Convert to fraction form
    390,609.96/539,056.26 = 220,833.96/x
  3. Step 3: Cross multiply
    390,609.96x = 539,056.26 × 220,833.96
  4. Step 4: Simplify right side
    390,609.96x = 119,041,928,558.59
  5. Step 5: Solve for x
    x = 119,041,928,558.59/390,609.96
  6. Step 6: Final answer
    x = 304,759.07

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1.5x scale

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.