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Finding the Fourth Proportional to 665,720, 918,696.88 and 363,914

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Solution

The fourth proportional to 665,720, 918,696.88 and 363,914 is: 502,203.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,720 : 918,696.88 = 363,914 : x
  2. Step 2: Convert to fraction form
    665,720/918,696.88 = 363,914/x
  3. Step 3: Cross multiply
    665,720x = 918,696.88 × 363,914
  4. Step 4: Simplify right side
    665,720x = 334,326,656,388.32
  5. Step 5: Solve for x
    x = 334,326,656,388.32/665,720
  6. Step 6: Final answer
    x = 502,203.11

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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.