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Finding the Fourth Proportional to 543,279.30, 814,918.95 and 403,311.30

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Solution

The fourth proportional to 543,279.30, 814,918.95 and 403,311.30 is: 604,966.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,279.30 : 814,918.95 = 403,311.30 : x
  2. Step 2: Convert to fraction form
    543,279.30/814,918.95 = 403,311.30/x
  3. Step 3: Cross multiply
    543,279.30x = 814,918.95 × 403,311.30
  4. Step 4: Simplify right side
    543,279.30x = 328,666,021,119.14
  5. Step 5: Solve for x
    x = 328,666,021,119.14/543,279.30
  6. Step 6: Final answer
    x = 604,966.95

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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.