Home / 285,430.90-393,877.74-156,343.64

Finding the Fourth Proportional to 285,430.90, 393,877.74 and 156,343.64

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Solution

The fourth proportional to 285,430.90, 393,877.74 and 156,343.64 is: 215,744.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,430.90 : 393,877.74 = 156,343.64 : x
  2. Step 2: Convert to fraction form
    285,430.90/393,877.74 = 156,343.64/x
  3. Step 3: Cross multiply
    285,430.90x = 393,877.74 × 156,343.64
  4. Step 4: Simplify right side
    285,430.90x = 61,580,279,586.57
  5. Step 5: Solve for x
    x = 61,580,279,586.57/285,430.90
  6. Step 6: Final answer
    x = 215,744.97

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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.