Home / 285,729.90-394,312.05-156,665.70

Finding the Fourth Proportional to 285,729.90, 394,312.05 and 156,665.70

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Solution

The fourth proportional to 285,729.90, 394,312.05 and 156,665.70 is: 216,201.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,729.90 : 394,312.05 = 156,665.70 : x
  2. Step 2: Convert to fraction form
    285,729.90/394,312.05 = 156,665.70/x
  3. Step 3: Cross multiply
    285,729.90x = 394,312.05 × 156,665.70
  4. Step 4: Simplify right side
    285,729.90x = 61,775,173,331.69
  5. Step 5: Solve for x
    x = 61,775,173,331.69/285,729.90
  6. Step 6: Final answer
    x = 216,201.29

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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.