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Finding the Fourth Proportional to 626,643.60, 939,965.40 and 377,811.60

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Solution

The fourth proportional to 626,643.60, 939,965.40 and 377,811.60 is: 566,717.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,643.60 : 939,965.40 = 377,811.60 : x
  2. Step 2: Convert to fraction form
    626,643.60/939,965.40 = 377,811.60/x
  3. Step 3: Cross multiply
    626,643.60x = 939,965.40 × 377,811.60
  4. Step 4: Simplify right side
    626,643.60x = 355,129,831,718.64
  5. Step 5: Solve for x
    x = 355,129,831,718.64/626,643.60
  6. Step 6: Final answer
    x = 566,717.40

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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.