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Finding the Fourth Proportional to 399,860.37, 599,828.15 and 147,145.69

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Solution

The fourth proportional to 399,860.37, 599,828.15 and 147,145.69 is: 220,732.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,860.37 : 599,828.15 = 147,145.69 : x
  2. Step 2: Convert to fraction form
    399,860.37/599,828.15 = 147,145.69/x
  3. Step 3: Cross multiply
    399,860.37x = 599,828.15 × 147,145.69
  4. Step 4: Simplify right side
    399,860.37x = 88,262,127,013.17
  5. Step 5: Solve for x
    x = 88,262,127,013.17/399,860.37
  6. Step 6: Final answer
    x = 220,732.37

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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.