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Finding the Fourth Proportional to 401,561.40, 554,061.80 and 240,355.20

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Solution

The fourth proportional to 401,561.40, 554,061.80 and 240,355.20 is: 331,634.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,561.40 : 554,061.80 = 240,355.20 : x
  2. Step 2: Convert to fraction form
    401,561.40/554,061.80 = 240,355.20/x
  3. Step 3: Cross multiply
    401,561.40x = 554,061.80 × 240,355.20
  4. Step 4: Simplify right side
    401,561.40x = 133,171,634,751.36
  5. Step 5: Solve for x
    x = 133,171,634,751.36/401,561.40
  6. Step 6: Final answer
    x = 331,634.55

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.