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Finding the Fourth Proportional to 539,161.40, 808,742.10 and 258,534.20

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Solution

The fourth proportional to 539,161.40, 808,742.10 and 258,534.20 is: 387,801.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,161.40 : 808,742.10 = 258,534.20 : x
  2. Step 2: Convert to fraction form
    539,161.40/808,742.10 = 258,534.20/x
  3. Step 3: Cross multiply
    539,161.40x = 808,742.10 × 258,534.20
  4. Step 4: Simplify right side
    539,161.40x = 209,087,491,829.82
  5. Step 5: Solve for x
    x = 209,087,491,829.82/539,161.40
  6. Step 6: Final answer
    x = 387,801.30

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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.