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Finding the Fourth Proportional to 404,528.80, 605,918.40 and 262,811.20

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Solution

The fourth proportional to 404,528.80, 605,918.40 and 262,811.20 is: 393,648.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,528.80 : 605,918.40 = 262,811.20 : x
  2. Step 2: Convert to fraction form
    404,528.80/605,918.40 = 262,811.20/x
  3. Step 3: Cross multiply
    404,528.80x = 605,918.40 × 262,811.20
  4. Step 4: Simplify right side
    404,528.80x = 159,242,141,806.08
  5. Step 5: Solve for x
    x = 159,242,141,806.08/404,528.80
  6. Step 6: Final answer
    x = 393,648.47

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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.