Home / 643,917.40-966,005.70-223,106.20

Finding the Fourth Proportional to 643,917.40, 966,005.70 and 223,106.20

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Solution

The fourth proportional to 643,917.40, 966,005.70 and 223,106.20 is: 334,704.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,917.40 : 966,005.70 = 223,106.20 : x
  2. Step 2: Convert to fraction form
    643,917.40/966,005.70 = 223,106.20/x
  3. Step 3: Cross multiply
    643,917.40x = 966,005.70 × 223,106.20
  4. Step 4: Simplify right side
    643,917.40x = 215,521,860,905.34
  5. Step 5: Solve for x
    x = 215,521,860,905.34/643,917.40
  6. Step 6: Final answer
    x = 334,704.20

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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.