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Finding the Fourth Proportional to 666,906, 920,330.34 and 365,100

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Solution

The fourth proportional to 666,906, 920,330.34 and 365,100 is: 503,838.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,906 : 920,330.34 = 365,100 : x
  2. Step 2: Convert to fraction form
    666,906/920,330.34 = 365,100/x
  3. Step 3: Cross multiply
    666,906x = 920,330.34 × 365,100
  4. Step 4: Simplify right side
    666,906x = 336,012,607,134
  5. Step 5: Solve for x
    x = 336,012,607,134/666,906
  6. Step 6: Final answer
    x = 503,838.03

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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.