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Finding the Fourth Proportional to 761,480.60, 1,141,212.90 and 405,728.60

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Solution

The fourth proportional to 761,480.60, 1,141,212.90 and 405,728.60 is: 608,055.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    761,480.60 : 1,141,212.90 = 405,728.60 : x
  2. Step 2: Convert to fraction form
    761,480.60/1,141,212.90 = 405,728.60/x
  3. Step 3: Cross multiply
    761,480.60x = 1,141,212.90 × 405,728.60
  4. Step 4: Simplify right side
    761,480.60x = 463,022,712,218.94
  5. Step 5: Solve for x
    x = 463,022,712,218.94/761,480.60
  6. Step 6: Final answer
    x = 608,055.82

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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.