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Finding the Fourth Proportional to 458,978.76, 686,993.94 and 245,212.20

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Solution

The fourth proportional to 458,978.76, 686,993.94 and 245,212.20 is: 367,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,978.76 : 686,993.94 = 245,212.20 : x
  2. Step 2: Convert to fraction form
    458,978.76/686,993.94 = 245,212.20/x
  3. Step 3: Cross multiply
    458,978.76x = 686,993.94 × 245,212.20
  4. Step 4: Simplify right side
    458,978.76x = 168,459,295,414.07
  5. Step 5: Solve for x
    x = 168,459,295,414.07/458,978.76
  6. Step 6: Final answer
    x = 367,030.70

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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.