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Finding the Fourth Proportional to 743,930.88, 1,026,603 and 421,670.64

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Solution

The fourth proportional to 743,930.88, 1,026,603 and 421,670.64 is: 581,893.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    743,930.88 : 1,026,603 = 421,670.64 : x
  2. Step 2: Convert to fraction form
    743,930.88/1,026,603 = 421,670.64/x
  3. Step 3: Cross multiply
    743,930.88x = 1,026,603 × 421,670.64
  4. Step 4: Simplify right side
    743,930.88x = 432,888,344,035.92
  5. Step 5: Solve for x
    x = 432,888,344,035.92/743,930.88
  6. Step 6: Final answer
    x = 581,893.23

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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.