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Finding the Fourth Proportional to 514,128.80, 771,193.20 and 303,658.40

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Solution

The fourth proportional to 514,128.80, 771,193.20 and 303,658.40 is: 455,487.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,128.80 : 771,193.20 = 303,658.40 : x
  2. Step 2: Convert to fraction form
    514,128.80/771,193.20 = 303,658.40/x
  3. Step 3: Cross multiply
    514,128.80x = 771,193.20 × 303,658.40
  4. Step 4: Simplify right side
    514,128.80x = 234,179,293,202.88
  5. Step 5: Solve for x
    x = 234,179,293,202.88/514,128.80
  6. Step 6: Final answer
    x = 455,487.60

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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.