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Finding the Fourth Proportional to 630,219.12, 869,712.75 and 343,739.22

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Solution

The fourth proportional to 630,219.12, 869,712.75 and 343,739.22 is: 474,365.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,219.12 : 869,712.75 = 343,739.22 : x
  2. Step 2: Convert to fraction form
    630,219.12/869,712.75 = 343,739.22/x
  3. Step 3: Cross multiply
    630,219.12x = 869,712.75 × 343,739.22
  4. Step 4: Simplify right side
    630,219.12x = 298,954,382,309.06
  5. Step 5: Solve for x
    x = 298,954,382,309.06/630,219.12
  6. Step 6: Final answer
    x = 474,365.78

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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.