Home / 643,815.40-965,718.30-194,535.40

Finding the Fourth Proportional to 643,815.40, 965,718.30 and 194,535.40

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Solution

The fourth proportional to 643,815.40, 965,718.30 and 194,535.40 is: 291,801.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,815.40 : 965,718.30 = 194,535.40 : x
  2. Step 2: Convert to fraction form
    643,815.40/965,718.30 = 194,535.40/x
  3. Step 3: Cross multiply
    643,815.40x = 965,718.30 × 194,535.40
  4. Step 4: Simplify right side
    643,815.40x = 187,866,395,777.82
  5. Step 5: Solve for x
    x = 187,866,395,777.82/643,815.40
  6. Step 6: Final answer
    x = 291,801.65

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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.