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Finding the Fourth Proportional to 647,554.30, 971,331.45 and 436,047.10

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Solution

The fourth proportional to 647,554.30, 971,331.45 and 436,047.10 is: 654,070.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,554.30 : 971,331.45 = 436,047.10 : x
  2. Step 2: Convert to fraction form
    647,554.30/971,331.45 = 436,047.10/x
  3. Step 3: Cross multiply
    647,554.30x = 971,331.45 × 436,047.10
  4. Step 4: Simplify right side
    647,554.30x = 423,546,261,911.30
  5. Step 5: Solve for x
    x = 423,546,261,911.30/647,554.30
  6. Step 6: Final answer
    x = 654,070.65

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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.