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Finding the Fourth Proportional to 623,408.40, 860,260.40 and 351,486

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Solution

The fourth proportional to 623,408.40, 860,260.40 and 351,486 is: 485,026.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,408.40 : 860,260.40 = 351,486 : x
  2. Step 2: Convert to fraction form
    623,408.40/860,260.40 = 351,486/x
  3. Step 3: Cross multiply
    623,408.40x = 860,260.40 × 351,486
  4. Step 4: Simplify right side
    623,408.40x = 302,369,486,954.40
  5. Step 5: Solve for x
    x = 302,369,486,954.40/623,408.40
  6. Step 6: Final answer
    x = 485,026.33

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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.