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Finding the Fourth Proportional to 621,684.60, 933,218.10 and 385,294.20

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Solution

The fourth proportional to 621,684.60, 933,218.10 and 385,294.20 is: 578,369.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,684.60 : 933,218.10 = 385,294.20 : x
  2. Step 2: Convert to fraction form
    621,684.60/933,218.10 = 385,294.20/x
  3. Step 3: Cross multiply
    621,684.60x = 933,218.10 × 385,294.20
  4. Step 4: Simplify right side
    621,684.60x = 359,563,521,265.02
  5. Step 5: Solve for x
    x = 359,563,521,265.02/621,684.60
  6. Step 6: Final answer
    x = 578,369.68

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Double scale
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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.