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Finding the Fourth Proportional to 389,840.80, 584,761.20 and 295,362.40

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Solution

The fourth proportional to 389,840.80, 584,761.20 and 295,362.40 is: 443,043.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,840.80 : 584,761.20 = 295,362.40 : x
  2. Step 2: Convert to fraction form
    389,840.80/584,761.20 = 295,362.40/x
  3. Step 3: Cross multiply
    389,840.80x = 584,761.20 × 295,362.40
  4. Step 4: Simplify right side
    389,840.80x = 172,716,471,458.88
  5. Step 5: Solve for x
    x = 172,716,471,458.88/389,840.80
  6. Step 6: Final answer
    x = 443,043.60

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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.