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Finding the Fourth Proportional to 638,421.60, 957,632.40 and 535,778.40

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Solution

The fourth proportional to 638,421.60, 957,632.40 and 535,778.40 is: 803,667.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,421.60 : 957,632.40 = 535,778.40 : x
  2. Step 2: Convert to fraction form
    638,421.60/957,632.40 = 535,778.40/x
  3. Step 3: Cross multiply
    638,421.60x = 957,632.40 × 535,778.40
  4. Step 4: Simplify right side
    638,421.60x = 513,078,755,060.16
  5. Step 5: Solve for x
    x = 513,078,755,060.16/638,421.60
  6. Step 6: Final answer
    x = 803,667.60

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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.