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Finding the Fourth Proportional to 665,906.90, 918,955.07 and 364,100.90

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Solution

The fourth proportional to 665,906.90, 918,955.07 and 364,100.90 is: 502,461.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,906.90 : 918,955.07 = 364,100.90 : x
  2. Step 2: Convert to fraction form
    665,906.90/918,955.07 = 364,100.90/x
  3. Step 3: Cross multiply
    665,906.90x = 918,955.07 × 364,100.90
  4. Step 4: Simplify right side
    665,906.90x = 334,592,361,631.28
  5. Step 5: Solve for x
    x = 334,592,361,631.28/665,906.90
  6. Step 6: Final answer
    x = 502,461.18

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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.