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Finding the Fourth Proportional to 613,511.53, 920,316.51 and 214,143.46

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Solution

The fourth proportional to 613,511.53, 920,316.51 and 214,143.46 is: 321,232.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,511.53 : 920,316.51 = 214,143.46 : x
  2. Step 2: Convert to fraction form
    613,511.53/920,316.51 = 214,143.46/x
  3. Step 3: Cross multiply
    613,511.53x = 920,316.51 × 214,143.46
  4. Step 4: Simplify right side
    613,511.53x = 197,079,761,746.53
  5. Step 5: Solve for x
    x = 197,079,761,746.53/613,511.53
  6. Step 6: Final answer
    x = 321,232.37

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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.