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Finding the Fourth Proportional to 413,901.60, 620,852.40 and 287,930.40

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Solution

The fourth proportional to 413,901.60, 620,852.40 and 287,930.40 is: 431,895.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,901.60 : 620,852.40 = 287,930.40 : x
  2. Step 2: Convert to fraction form
    413,901.60/620,852.40 = 287,930.40/x
  3. Step 3: Cross multiply
    413,901.60x = 620,852.40 × 287,930.40
  4. Step 4: Simplify right side
    413,901.60x = 178,762,279,872.96
  5. Step 5: Solve for x
    x = 178,762,279,872.96/413,901.60
  6. Step 6: Final answer
    x = 431,895.60

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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.