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Finding the Fourth Proportional to 665,696.34, 918,611.28 and 379,160.46

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Solution

The fourth proportional to 665,696.34, 918,611.28 and 379,160.46 is: 523,213.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,696.34 : 918,611.28 = 379,160.46 : x
  2. Step 2: Convert to fraction form
    665,696.34/918,611.28 = 379,160.46/x
  3. Step 3: Cross multiply
    665,696.34x = 918,611.28 × 379,160.46
  4. Step 4: Simplify right side
    665,696.34x = 348,301,075,485.99
  5. Step 5: Solve for x
    x = 348,301,075,485.99/665,696.34
  6. Step 6: Final answer
    x = 523,213.14

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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.