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Finding the Fourth Proportional to 261,029.80, 390,669.90 and 261,029.80

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Solution

The fourth proportional to 261,029.80, 390,669.90 and 261,029.80 is: 390,669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,029.80 : 390,669.90 = 261,029.80 : x
  2. Step 2: Convert to fraction form
    261,029.80/390,669.90 = 261,029.80/x
  3. Step 3: Cross multiply
    261,029.80x = 390,669.90 × 261,029.80
  4. Step 4: Simplify right side
    261,029.80x = 101,976,485,863.02
  5. Step 5: Solve for x
    x = 101,976,485,863.02/261,029.80
  6. Step 6: Final answer
    x = 390,669.90

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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.