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Finding the Fourth Proportional to 403,528.19, 604,978.54 and 261,072.48

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Solution

The fourth proportional to 403,528.19, 604,978.54 and 261,072.48 is: 391,405.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,528.19 : 604,978.54 = 261,072.48 : x
  2. Step 2: Convert to fraction form
    403,528.19/604,978.54 = 261,072.48/x
  3. Step 3: Cross multiply
    403,528.19x = 604,978.54 × 261,072.48
  4. Step 4: Simplify right side
    403,528.19x = 157,943,247,131.90
  5. Step 5: Solve for x
    x = 157,943,247,131.90/403,528.19
  6. Step 6: Final answer
    x = 391,405.73

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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.