Home / 541,128.20-811,692.30-429,153.80

Finding the Fourth Proportional to 541,128.20, 811,692.30 and 429,153.80

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Solution

The fourth proportional to 541,128.20, 811,692.30 and 429,153.80 is: 643,730.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,128.20 : 811,692.30 = 429,153.80 : x
  2. Step 2: Convert to fraction form
    541,128.20/811,692.30 = 429,153.80/x
  3. Step 3: Cross multiply
    541,128.20x = 811,692.30 × 429,153.80
  4. Step 4: Simplify right side
    541,128.20x = 348,340,834,975.74
  5. Step 5: Solve for x
    x = 348,340,834,975.74/541,128.20
  6. Step 6: Final answer
    x = 643,730.70

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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.