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Finding the Fourth Proportional to 656,995.20, 985,492.80 and 213,763.20

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Solution

The fourth proportional to 656,995.20, 985,492.80 and 213,763.20 is: 320,644.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,995.20 : 985,492.80 = 213,763.20 : x
  2. Step 2: Convert to fraction form
    656,995.20/985,492.80 = 213,763.20/x
  3. Step 3: Cross multiply
    656,995.20x = 985,492.80 × 213,763.20
  4. Step 4: Simplify right side
    656,995.20x = 210,662,094,504.96
  5. Step 5: Solve for x
    x = 210,662,094,504.96/656,995.20
  6. Step 6: Final answer
    x = 320,644.80

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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.