Home / 319,155.20-478,359.12-205,157.60

Finding the Fourth Proportional to 319,155.20, 478,359.12 and 205,157.60

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Solution

The fourth proportional to 319,155.20, 478,359.12 and 205,157.60 is: 307,496.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,155.20 : 478,359.12 = 205,157.60 : x
  2. Step 2: Convert to fraction form
    319,155.20/478,359.12 = 205,157.60/x
  3. Step 3: Cross multiply
    319,155.20x = 478,359.12 × 205,157.60
  4. Step 4: Simplify right side
    319,155.20x = 98,139,008,997.31
  5. Step 5: Solve for x
    x = 98,139,008,997.31/319,155.20
  6. Step 6: Final answer
    x = 307,496.19

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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.