Home / 691,128.20-1,036,692.30-292,219.40

Finding the Fourth Proportional to 691,128.20, 1,036,692.30 and 292,219.40

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Solution

The fourth proportional to 691,128.20, 1,036,692.30 and 292,219.40 is: 438,329.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,128.20 : 1,036,692.30 = 292,219.40 : x
  2. Step 2: Convert to fraction form
    691,128.20/1,036,692.30 = 292,219.40/x
  3. Step 3: Cross multiply
    691,128.20x = 1,036,692.30 × 292,219.40
  4. Step 4: Simplify right side
    691,128.20x = 302,941,601,890.62
  5. Step 5: Solve for x
    x = 302,941,601,890.62/691,128.20
  6. Step 6: Final answer
    x = 438,329.10

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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.