Home / 513,300.20-769,950.30-139,323.20

Finding the Fourth Proportional to 513,300.20, 769,950.30 and 139,323.20

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Solution

The fourth proportional to 513,300.20, 769,950.30 and 139,323.20 is: 208,984.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,300.20 : 769,950.30 = 139,323.20 : x
  2. Step 2: Convert to fraction form
    513,300.20/769,950.30 = 139,323.20/x
  3. Step 3: Cross multiply
    513,300.20x = 769,950.30 × 139,323.20
  4. Step 4: Simplify right side
    513,300.20x = 107,271,935,787.21
  5. Step 5: Solve for x
    x = 107,271,935,787.21/513,300.20
  6. Step 6: Final answer
    x = 208,984.79

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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.