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Finding the Fourth Proportional to 665,145.12, 917,898.84 and 363,339.12

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Solution

The fourth proportional to 665,145.12, 917,898.84 and 363,339.12 is: 501,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,145.12 : 917,898.84 = 363,339.12 : x
  2. Step 2: Convert to fraction form
    665,145.12/917,898.84 = 363,339.12/x
  3. Step 3: Cross multiply
    665,145.12x = 917,898.84 × 363,339.12
  4. Step 4: Simplify right side
    665,145.12x = 333,508,556,774.62
  5. Step 5: Solve for x
    x = 333,508,556,774.62/665,145.12
  6. Step 6: Final answer
    x = 501,407.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.