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Finding the Fourth Proportional to 503,742.20, 755,613.30 and 389,580.80

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Solution

The fourth proportional to 503,742.20, 755,613.30 and 389,580.80 is: 584,371.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,742.20 : 755,613.30 = 389,580.80 : x
  2. Step 2: Convert to fraction form
    503,742.20/755,613.30 = 389,580.80/x
  3. Step 3: Cross multiply
    503,742.20x = 755,613.30 × 389,580.80
  4. Step 4: Simplify right side
    503,742.20x = 294,372,433,904.64
  5. Step 5: Solve for x
    x = 294,372,433,904.64/503,742.20
  6. Step 6: Final answer
    x = 584,371.20

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Double scale
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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.