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Finding the Fourth Proportional to 643,733.80, 965,600.70 and 477,845.80

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Solution

The fourth proportional to 643,733.80, 965,600.70 and 477,845.80 is: 716,768.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,733.80 : 965,600.70 = 477,845.80 : x
  2. Step 2: Convert to fraction form
    643,733.80/965,600.70 = 477,845.80/x
  3. Step 3: Cross multiply
    643,733.80x = 965,600.70 × 477,845.80
  4. Step 4: Simplify right side
    643,733.80x = 461,408,238,972.06
  5. Step 5: Solve for x
    x = 461,408,238,972.06/643,733.80
  6. Step 6: Final answer
    x = 716,768.70

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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.