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Finding the Fourth Proportional to 328,665.90, 453,561.21 and 207,859.26

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Solution

The fourth proportional to 328,665.90, 453,561.21 and 207,859.26 is: 286,847.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,665.90 : 453,561.21 = 207,859.26 : x
  2. Step 2: Convert to fraction form
    328,665.90/453,561.21 = 207,859.26/x
  3. Step 3: Cross multiply
    328,665.90x = 453,561.21 × 207,859.26
  4. Step 4: Simplify right side
    328,665.90x = 94,276,897,475.30
  5. Step 5: Solve for x
    x = 94,276,897,475.30/328,665.90
  6. Step 6: Final answer
    x = 286,847.21

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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.