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Finding the Fourth Proportional to 521,790.48, 782,948.34 and 388,937.52

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Solution

The fourth proportional to 521,790.48, 782,948.34 and 388,937.52 is: 583,602.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,790.48 : 782,948.34 = 388,937.52 : x
  2. Step 2: Convert to fraction form
    521,790.48/782,948.34 = 388,937.52/x
  3. Step 3: Cross multiply
    521,790.48x = 782,948.34 × 388,937.52
  4. Step 4: Simplify right side
    521,790.48x = 304,517,985,647.72
  5. Step 5: Solve for x
    x = 304,517,985,647.72/521,790.48
  6. Step 6: Final answer
    x = 583,602.03

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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.