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Finding the Fourth Proportional to 623,855.40, 860,918.67 and 351,922.20

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Solution

The fourth proportional to 623,855.40, 860,918.67 and 351,922.20 is: 485,651.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,855.40 : 860,918.67 = 351,922.20 : x
  2. Step 2: Convert to fraction form
    623,855.40/860,918.67 = 351,922.20/x
  3. Step 3: Cross multiply
    623,855.40x = 860,918.67 × 351,922.20
  4. Step 4: Simplify right side
    623,855.40x = 302,976,392,367.47
  5. Step 5: Solve for x
    x = 302,976,392,367.47/623,855.40
  6. Step 6: Final answer
    x = 485,651.63

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1.5x scale

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.