Home / 513,215.40-769,823.10-492,220.20

Finding the Fourth Proportional to 513,215.40, 769,823.10 and 492,220.20

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Solution

The fourth proportional to 513,215.40, 769,823.10 and 492,220.20 is: 738,330.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,215.40 : 769,823.10 = 492,220.20 : x
  2. Step 2: Convert to fraction form
    513,215.40/769,823.10 = 492,220.20/x
  3. Step 3: Cross multiply
    513,215.40x = 769,823.10 × 492,220.20
  4. Step 4: Simplify right side
    513,215.40x = 378,922,480,246.62
  5. Step 5: Solve for x
    x = 378,922,480,246.62/513,215.40
  6. Step 6: Final answer
    x = 738,330.30

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Half scale
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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.