Home / 643,938.40-965,907.60-223,214.32

Finding the Fourth Proportional to 643,938.40, 965,907.60 and 223,214.32

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Solution

The fourth proportional to 643,938.40, 965,907.60 and 223,214.32 is: 334,821.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,938.40 : 965,907.60 = 223,214.32 : x
  2. Step 2: Convert to fraction form
    643,938.40/965,907.60 = 223,214.32/x
  3. Step 3: Cross multiply
    643,938.40x = 965,907.60 × 223,214.32
  4. Step 4: Simplify right side
    643,938.40x = 215,604,408,116.83
  5. Step 5: Solve for x
    x = 215,604,408,116.83/643,938.40
  6. Step 6: Final answer
    x = 334,821.48

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Half scale
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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.