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Finding the Fourth Proportional to 403,528.80, 605,228.40 and 122,980.80

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Solution

The fourth proportional to 403,528.80, 605,228.40 and 122,980.80 is: 184,451.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,528.80 : 605,228.40 = 122,980.80 : x
  2. Step 2: Convert to fraction form
    403,528.80/605,228.40 = 122,980.80/x
  3. Step 3: Cross multiply
    403,528.80x = 605,228.40 × 122,980.80
  4. Step 4: Simplify right side
    403,528.80x = 74,431,472,814.72
  5. Step 5: Solve for x
    x = 74,431,472,814.72/403,528.80
  6. Step 6: Final answer
    x = 184,451.45

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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.