Home / 285,435.20-427,743.20-209,966.40

Finding the Fourth Proportional to 285,435.20, 427,743.20 and 209,966.40

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Solution

The fourth proportional to 285,435.20, 427,743.20 and 209,966.40 is: 314,648.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,435.20 : 427,743.20 = 209,966.40 : x
  2. Step 2: Convert to fraction form
    285,435.20/427,743.20 = 209,966.40/x
  3. Step 3: Cross multiply
    285,435.20x = 427,743.20 × 209,966.40
  4. Step 4: Simplify right side
    285,435.20x = 89,811,699,828.48
  5. Step 5: Solve for x
    x = 89,811,699,828.48/285,435.20
  6. Step 6: Final answer
    x = 314,648.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.