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Finding the Fourth Proportional to 665,494.07, 918,825.26 and 393,649.29

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Solution

The fourth proportional to 665,494.07, 918,825.26 and 393,649.29 is: 543,498.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,494.07 : 918,825.26 = 393,649.29 : x
  2. Step 2: Convert to fraction form
    665,494.07/918,825.26 = 393,649.29/x
  3. Step 3: Cross multiply
    665,494.07x = 918,825.26 × 393,649.29
  4. Step 4: Simplify right side
    665,494.07x = 361,694,909,264.82
  5. Step 5: Solve for x
    x = 361,694,909,264.82/665,494.07
  6. Step 6: Final answer
    x = 543,498.32

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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.