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Finding the Fourth Proportional to 665,718, 918,694.12 and 363,912

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Solution

The fourth proportional to 665,718, 918,694.12 and 363,912 is: 502,200.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,718 : 918,694.12 = 363,912 : x
  2. Step 2: Convert to fraction form
    665,718/918,694.12 = 363,912/x
  3. Step 3: Cross multiply
    665,718x = 918,694.12 × 363,912
  4. Step 4: Simplify right side
    665,718x = 334,323,814,597.44
  5. Step 5: Solve for x
    x = 334,323,814,597.44/665,718
  6. Step 6: Final answer
    x = 502,200.35

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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.