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Finding the Fourth Proportional to 285,267.90, 393,675.70 and 156,211.80

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Solution

The fourth proportional to 285,267.90, 393,675.70 and 156,211.80 is: 215,575.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,267.90 : 393,675.70 = 156,211.80 : x
  2. Step 2: Convert to fraction form
    285,267.90/393,675.70 = 156,211.80/x
  3. Step 3: Cross multiply
    285,267.90x = 393,675.70 × 156,211.80
  4. Step 4: Simplify right side
    285,267.90x = 61,496,789,713.26
  5. Step 5: Solve for x
    x = 61,496,789,713.26/285,267.90
  6. Step 6: Final answer
    x = 215,575.57

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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.