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Finding the Fourth Proportional to 539,187.40, 808,781.10 and 434,211.40

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Solution

The fourth proportional to 539,187.40, 808,781.10 and 434,211.40 is: 651,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,187.40 : 808,781.10 = 434,211.40 : x
  2. Step 2: Convert to fraction form
    539,187.40/808,781.10 = 434,211.40/x
  3. Step 3: Cross multiply
    539,187.40x = 808,781.10 × 434,211.40
  4. Step 4: Simplify right side
    539,187.40x = 351,181,973,724.54
  5. Step 5: Solve for x
    x = 351,181,973,724.54/539,187.40
  6. Step 6: Final answer
    x = 651,317.10

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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.