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Finding the Fourth Proportional to 578,638.20, 797,987.82 and 397,029.72

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Solution

The fourth proportional to 578,638.20, 797,987.82 and 397,029.72 is: 547,535.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,638.20 : 797,987.82 = 397,029.72 : x
  2. Step 2: Convert to fraction form
    578,638.20/797,987.82 = 397,029.72/x
  3. Step 3: Cross multiply
    578,638.20x = 797,987.82 × 397,029.72
  4. Step 4: Simplify right side
    578,638.20x = 316,824,880,738.01
  5. Step 5: Solve for x
    x = 316,824,880,738.01/578,638.20
  6. Step 6: Final answer
    x = 547,535.37

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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.