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Finding the Fourth Proportional to 605,076.10, 907,808.55 and 405,621.70

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Solution

The fourth proportional to 605,076.10, 907,808.55 and 405,621.70 is: 608,562.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,076.10 : 907,808.55 = 405,621.70 : x
  2. Step 2: Convert to fraction form
    605,076.10/907,808.55 = 405,621.70/x
  3. Step 3: Cross multiply
    605,076.10x = 907,808.55 × 405,621.70
  4. Step 4: Simplify right side
    605,076.10x = 368,226,847,325.54
  5. Step 5: Solve for x
    x = 368,226,847,325.54/605,076.10
  6. Step 6: Final answer
    x = 608,562.87

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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.