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Finding the Fourth Proportional to 401,036.80, 601,555.20 and 259,319.20

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Solution

The fourth proportional to 401,036.80, 601,555.20 and 259,319.20 is: 388,978.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,036.80 : 601,555.20 = 259,319.20 : x
  2. Step 2: Convert to fraction form
    401,036.80/601,555.20 = 259,319.20/x
  3. Step 3: Cross multiply
    401,036.80x = 601,555.20 × 259,319.20
  4. Step 4: Simplify right side
    401,036.80x = 155,994,813,219.84
  5. Step 5: Solve for x
    x = 155,994,813,219.84/401,036.80
  6. Step 6: Final answer
    x = 388,978.80

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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.