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Finding the Fourth Proportional to 666,188.90, 919,640.91 and 424,795.94

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Solution

The fourth proportional to 666,188.90, 919,640.91 and 424,795.94 is: 586,409.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,188.90 : 919,640.91 = 424,795.94 : x
  2. Step 2: Convert to fraction form
    666,188.90/919,640.91 = 424,795.94/x
  3. Step 3: Cross multiply
    666,188.90x = 919,640.91 × 424,795.94
  4. Step 4: Simplify right side
    666,188.90x = 390,659,724,825.91
  5. Step 5: Solve for x
    x = 390,659,724,825.91/666,188.90
  6. Step 6: Final answer
    x = 586,409.84

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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.