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Finding the Fourth Proportional to 642,381.57, 886,448.00 and 355,880.93

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Solution

The fourth proportional to 642,381.57, 886,448.00 and 355,880.93 is: 491,094.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,381.57 : 886,448.00 = 355,880.93 : x
  2. Step 2: Convert to fraction form
    642,381.57/886,448.00 = 355,880.93/x
  3. Step 3: Cross multiply
    642,381.57x = 886,448.00 × 355,880.93
  4. Step 4: Simplify right side
    642,381.57x = 315,469,935,094.10
  5. Step 5: Solve for x
    x = 315,469,935,094.10/642,381.57
  6. Step 6: Final answer
    x = 491,094.31

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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.