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Finding the Fourth Proportional to 399,186.30, 598,779.45 and 355,883.70

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Solution

The fourth proportional to 399,186.30, 598,779.45 and 355,883.70 is: 533,825.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,186.30 : 598,779.45 = 355,883.70 : x
  2. Step 2: Convert to fraction form
    399,186.30/598,779.45 = 355,883.70/x
  3. Step 3: Cross multiply
    399,186.30x = 598,779.45 × 355,883.70
  4. Step 4: Simplify right side
    399,186.30x = 213,095,846,149.97
  5. Step 5: Solve for x
    x = 213,095,846,149.97/399,186.30
  6. Step 6: Final answer
    x = 533,825.55

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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.