Home / 643,749.20-965,623.80-170,482.40

Finding the Fourth Proportional to 643,749.20, 965,623.80 and 170,482.40

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Solution

The fourth proportional to 643,749.20, 965,623.80 and 170,482.40 is: 255,723.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,749.20 : 965,623.80 = 170,482.40 : x
  2. Step 2: Convert to fraction form
    643,749.20/965,623.80 = 170,482.40/x
  3. Step 3: Cross multiply
    643,749.20x = 965,623.80 × 170,482.40
  4. Step 4: Simplify right side
    643,749.20x = 164,621,862,921.12
  5. Step 5: Solve for x
    x = 164,621,862,921.12/643,749.20
  6. Step 6: Final answer
    x = 255,723.60

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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.