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Finding the Fourth Proportional to 285,503.40, 428,255.10 and 179,980.20

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Solution

The fourth proportional to 285,503.40, 428,255.10 and 179,980.20 is: 269,970.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,503.40 : 428,255.10 = 179,980.20 : x
  2. Step 2: Convert to fraction form
    285,503.40/428,255.10 = 179,980.20/x
  3. Step 3: Cross multiply
    285,503.40x = 428,255.10 × 179,980.20
  4. Step 4: Simplify right side
    285,503.40x = 77,077,438,549.02
  5. Step 5: Solve for x
    x = 77,077,438,549.02/285,503.40
  6. Step 6: Final answer
    x = 269,970.30

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Similar ratio
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1.5x scale

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.