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Finding the Fourth Proportional to 539,445.78, 744,431.51 and 297,728.35

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Solution

The fourth proportional to 539,445.78, 744,431.51 and 297,728.35 is: 410,863.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,445.78 : 744,431.51 = 297,728.35 : x
  2. Step 2: Convert to fraction form
    539,445.78/744,431.51 = 297,728.35/x
  3. Step 3: Cross multiply
    539,445.78x = 744,431.51 × 297,728.35
  4. Step 4: Simplify right side
    539,445.78x = 221,638,365,160.31
  5. Step 5: Solve for x
    x = 221,638,365,160.31/539,445.78
  6. Step 6: Final answer
    x = 410,863.10

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.