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Finding the Fourth Proportional to 605,084.60, 907,821.30 and 405,630.20

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Solution

The fourth proportional to 605,084.60, 907,821.30 and 405,630.20 is: 608,575.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,084.60 : 907,821.30 = 405,630.20 : x
  2. Step 2: Convert to fraction form
    605,084.60/907,821.30 = 405,630.20/x
  3. Step 3: Cross multiply
    605,084.60x = 907,821.30 × 405,630.20
  4. Step 4: Simplify right side
    605,084.60x = 368,239,735,483.26
  5. Step 5: Solve for x
    x = 368,239,735,483.26/605,084.60
  6. Step 6: Final answer
    x = 608,575.62

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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.