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Finding the Fourth Proportional to 790,215, 1,090,496.64 and 427,638.86

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Solution

The fourth proportional to 790,215, 1,090,496.64 and 427,638.86 is: 590,141.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    790,215 : 1,090,496.64 = 427,638.86 : x
  2. Step 2: Convert to fraction form
    790,215/1,090,496.64 = 427,638.86/x
  3. Step 3: Cross multiply
    790,215x = 1,090,496.64 × 427,638.86
  4. Step 4: Simplify right side
    790,215x = 466,338,739,963.43
  5. Step 5: Solve for x
    x = 466,338,739,963.43/790,215
  6. Step 6: Final answer
    x = 590,141.59

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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.