Home / 642,624.40-963,936.60-493,325.20

Finding the Fourth Proportional to 642,624.40, 963,936.60 and 493,325.20

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Solution

The fourth proportional to 642,624.40, 963,936.60 and 493,325.20 is: 739,987.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,624.40 : 963,936.60 = 493,325.20 : x
  2. Step 2: Convert to fraction form
    642,624.40/963,936.60 = 493,325.20/x
  3. Step 3: Cross multiply
    642,624.40x = 963,936.60 × 493,325.20
  4. Step 4: Simplify right side
    642,624.40x = 475,534,215,982.32
  5. Step 5: Solve for x
    x = 475,534,215,982.32/642,624.40
  6. Step 6: Final answer
    x = 739,987.80

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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.