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Finding the Fourth Proportional to 579,383.70, 869,075.55 and 411,422.10

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Solution

The fourth proportional to 579,383.70, 869,075.55 and 411,422.10 is: 617,133.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,383.70 : 869,075.55 = 411,422.10 : x
  2. Step 2: Convert to fraction form
    579,383.70/869,075.55 = 411,422.10/x
  3. Step 3: Cross multiply
    579,383.70x = 869,075.55 × 411,422.10
  4. Step 4: Simplify right side
    579,383.70x = 357,556,887,839.66
  5. Step 5: Solve for x
    x = 357,556,887,839.66/579,383.70
  6. Step 6: Final answer
    x = 617,133.15

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Half scale
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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.