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Finding the Fourth Proportional to 626,692.20, 940,038.30 and 311,764.20

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Solution

The fourth proportional to 626,692.20, 940,038.30 and 311,764.20 is: 467,646.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,692.20 : 940,038.30 = 311,764.20 : x
  2. Step 2: Convert to fraction form
    626,692.20/940,038.30 = 311,764.20/x
  3. Step 3: Cross multiply
    626,692.20x = 940,038.30 × 311,764.20
  4. Step 4: Simplify right side
    626,692.20x = 293,070,288,568.86
  5. Step 5: Solve for x
    x = 293,070,288,568.86/626,692.20
  6. Step 6: Final answer
    x = 467,646.30

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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.