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Finding the Fourth Proportional to 666,207.18, 919,107.67 and 424,446.46

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Solution

The fourth proportional to 666,207.18, 919,107.67 and 424,446.46 is: 585,571.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,207.18 : 919,107.67 = 424,446.46 : x
  2. Step 2: Convert to fraction form
    666,207.18/919,107.67 = 424,446.46/x
  3. Step 3: Cross multiply
    666,207.18x = 919,107.67 × 424,446.46
  4. Step 4: Simplify right side
    666,207.18x = 390,111,996,890.35
  5. Step 5: Solve for x
    x = 390,111,996,890.35/666,207.18
  6. Step 6: Final answer
    x = 585,571.59

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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.