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Finding the Fourth Proportional to 666,187.90, 919,639.53 and 424,794.94

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Solution

The fourth proportional to 666,187.90, 919,639.53 and 424,794.94 is: 586,408.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,187.90 : 919,639.53 = 424,794.94 : x
  2. Step 2: Convert to fraction form
    666,187.90/919,639.53 = 424,794.94/x
  3. Step 3: Cross multiply
    666,187.90x = 919,639.53 × 424,794.94
  4. Step 4: Simplify right side
    666,187.90x = 390,658,218,967.98
  5. Step 5: Solve for x
    x = 390,658,218,967.98/666,187.90
  6. Step 6: Final answer
    x = 586,408.46

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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.