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Finding the Fourth Proportional to 579,417.70, 869,126.55 and 411,456.10

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Solution

The fourth proportional to 579,417.70, 869,126.55 and 411,456.10 is: 617,184.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,417.70 : 869,126.55 = 411,456.10 : x
  2. Step 2: Convert to fraction form
    579,417.70/869,126.55 = 411,456.10/x
  3. Step 3: Cross multiply
    579,417.70x = 869,126.55 × 411,456.10
  4. Step 4: Simplify right side
    579,417.70x = 357,607,420,669.46
  5. Step 5: Solve for x
    x = 357,607,420,669.46/579,417.70
  6. Step 6: Final answer
    x = 617,184.15

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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.