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Finding the Fourth Proportional to 605,123.60, 907,879.80 and 405,669.20

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Solution

The fourth proportional to 605,123.60, 907,879.80 and 405,669.20 is: 608,634.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,123.60 : 907,879.80 = 405,669.20 : x
  2. Step 2: Convert to fraction form
    605,123.60/907,879.80 = 405,669.20/x
  3. Step 3: Cross multiply
    605,123.60x = 907,879.80 × 405,669.20
  4. Step 4: Simplify right side
    605,123.60x = 368,298,872,162.16
  5. Step 5: Solve for x
    x = 368,298,872,162.16/605,123.60
  6. Step 6: Final answer
    x = 608,634.12

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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.