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Finding the Fourth Proportional to 604,989.20, 907,921.20 and 338,466.80

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Solution

The fourth proportional to 604,989.20, 907,921.20 and 338,466.80 is: 507,944.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,989.20 : 907,921.20 = 338,466.80 : x
  2. Step 2: Convert to fraction form
    604,989.20/907,921.20 = 338,466.80/x
  3. Step 3: Cross multiply
    604,989.20x = 907,921.20 × 338,466.80
  4. Step 4: Simplify right side
    604,989.20x = 307,301,183,216.16
  5. Step 5: Solve for x
    x = 307,301,183,216.16/604,989.20
  6. Step 6: Final answer
    x = 507,944.91

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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.