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Finding the Fourth Proportional to 328,600.80, 492,536.70 and 128,854.80

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Solution

The fourth proportional to 328,600.80, 492,536.70 and 128,854.80 is: 193,139.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,600.80 : 492,536.70 = 128,854.80 : x
  2. Step 2: Convert to fraction form
    328,600.80/492,536.70 = 128,854.80/x
  3. Step 3: Cross multiply
    328,600.80x = 492,536.70 × 128,854.80
  4. Step 4: Simplify right side
    328,600.80x = 63,465,717,971.16
  5. Step 5: Solve for x
    x = 63,465,717,971.16/328,600.80
  6. Step 6: Final answer
    x = 193,139.27

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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.