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Finding the Fourth Proportional to 415,751.40, 623,627.10 and 411,814.80

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Solution

The fourth proportional to 415,751.40, 623,627.10 and 411,814.80 is: 617,722.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,751.40 : 623,627.10 = 411,814.80 : x
  2. Step 2: Convert to fraction form
    415,751.40/623,627.10 = 411,814.80/x
  3. Step 3: Cross multiply
    415,751.40x = 623,627.10 × 411,814.80
  4. Step 4: Simplify right side
    415,751.40x = 256,818,869,461.08
  5. Step 5: Solve for x
    x = 256,818,869,461.08/415,751.40
  6. Step 6: Final answer
    x = 617,722.20

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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.