Home / 643,816.10-965,724.15-312,040.10

Finding the Fourth Proportional to 643,816.10, 965,724.15 and 312,040.10

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Solution

The fourth proportional to 643,816.10, 965,724.15 and 312,040.10 is: 468,060.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,816.10 : 965,724.15 = 312,040.10 : x
  2. Step 2: Convert to fraction form
    643,816.10/965,724.15 = 312,040.10/x
  3. Step 3: Cross multiply
    643,816.10x = 965,724.15 × 312,040.10
  4. Step 4: Simplify right side
    643,816.10x = 301,344,660,338.42
  5. Step 5: Solve for x
    x = 301,344,660,338.42/643,816.10
  6. Step 6: Final answer
    x = 468,060.15

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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.