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Finding the Fourth Proportional to 521,017.40, 781,526.10 and 352,618.40

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Solution

The fourth proportional to 521,017.40, 781,526.10 and 352,618.40 is: 528,927.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,017.40 : 781,526.10 = 352,618.40 : x
  2. Step 2: Convert to fraction form
    521,017.40/781,526.10 = 352,618.40/x
  3. Step 3: Cross multiply
    521,017.40x = 781,526.10 × 352,618.40
  4. Step 4: Simplify right side
    521,017.40x = 275,580,482,940.24
  5. Step 5: Solve for x
    x = 275,580,482,940.24/521,017.40
  6. Step 6: Final answer
    x = 528,927.60

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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.