Home / 481,210.20-721,815.30-345,907.80

Finding the Fourth Proportional to 481,210.20, 721,815.30 and 345,907.80

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Solution

The fourth proportional to 481,210.20, 721,815.30 and 345,907.80 is: 518,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,210.20 : 721,815.30 = 345,907.80 : x
  2. Step 2: Convert to fraction form
    481,210.20/721,815.30 = 345,907.80/x
  3. Step 3: Cross multiply
    481,210.20x = 721,815.30 × 345,907.80
  4. Step 4: Simplify right side
    481,210.20x = 249,681,542,429.34
  5. Step 5: Solve for x
    x = 249,681,542,429.34/481,210.20
  6. Step 6: Final answer
    x = 518,861.70

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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.