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Finding the Fourth Proportional to 401,036.40, 601,554.60 and 259,318.80

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Solution

The fourth proportional to 401,036.40, 601,554.60 and 259,318.80 is: 388,978.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,036.40 : 601,554.60 = 259,318.80 : x
  2. Step 2: Convert to fraction form
    401,036.40/601,554.60 = 259,318.80/x
  3. Step 3: Cross multiply
    401,036.40x = 601,554.60 × 259,318.80
  4. Step 4: Simplify right side
    401,036.40x = 155,994,417,006.48
  5. Step 5: Solve for x
    x = 155,994,417,006.48/401,036.40
  6. Step 6: Final answer
    x = 388,978.20

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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.