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Finding the Fourth Proportional to 387,021.69, 579,030.39 and 339,277.59

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Solution

The fourth proportional to 387,021.69, 579,030.39 and 339,277.59 is: 507,599.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,021.69 : 579,030.39 = 339,277.59 : x
  2. Step 2: Convert to fraction form
    387,021.69/579,030.39 = 339,277.59/x
  3. Step 3: Cross multiply
    387,021.69x = 579,030.39 × 339,277.59
  4. Step 4: Simplify right side
    387,021.69x = 196,452,035,255.96
  5. Step 5: Solve for x
    x = 196,452,035,255.96/387,021.69
  6. Step 6: Final answer
    x = 507,599.55

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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.