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Finding the Fourth Proportional to 328,588.62, 453,243.51 and 215,418.66

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Solution

The fourth proportional to 328,588.62, 453,243.51 and 215,418.66 is: 297,140.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,588.62 : 453,243.51 = 215,418.66 : x
  2. Step 2: Convert to fraction form
    328,588.62/453,243.51 = 215,418.66/x
  3. Step 3: Cross multiply
    328,588.62x = 453,243.51 × 215,418.66
  4. Step 4: Simplify right side
    328,588.62x = 97,637,109,577.90
  5. Step 5: Solve for x
    x = 97,637,109,577.90/328,588.62
  6. Step 6: Final answer
    x = 297,140.87

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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.