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Finding the Fourth Proportional to 481,208.70, 721,813.05 and 345,906.30

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Solution

The fourth proportional to 481,208.70, 721,813.05 and 345,906.30 is: 518,859.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,208.70 : 721,813.05 = 345,906.30 : x
  2. Step 2: Convert to fraction form
    481,208.70/721,813.05 = 345,906.30/x
  3. Step 3: Cross multiply
    481,208.70x = 721,813.05 × 345,906.30
  4. Step 4: Simplify right side
    481,208.70x = 249,679,681,417.22
  5. Step 5: Solve for x
    x = 249,679,681,417.22/481,208.70
  6. Step 6: Final answer
    x = 518,859.45

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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.