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Finding the Fourth Proportional to 576,078.30, 864,117.45 and 543,419.10

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Solution

The fourth proportional to 576,078.30, 864,117.45 and 543,419.10 is: 815,128.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    576,078.30 : 864,117.45 = 543,419.10 : x
  2. Step 2: Convert to fraction form
    576,078.30/864,117.45 = 543,419.10/x
  3. Step 3: Cross multiply
    576,078.30x = 864,117.45 × 543,419.10
  4. Step 4: Simplify right side
    576,078.30x = 469,577,926,973.30
  5. Step 5: Solve for x
    x = 469,577,926,973.30/576,078.30
  6. Step 6: Final answer
    x = 815,128.65

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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.