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Finding the Fourth Proportional to 628,857, 867,795.48 and 342,378.12

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Solution

The fourth proportional to 628,857, 867,795.48 and 342,378.12 is: 472,467.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,857 : 867,795.48 = 342,378.12 : x
  2. Step 2: Convert to fraction form
    628,857/867,795.48 = 342,378.12/x
  3. Step 3: Cross multiply
    628,857x = 867,795.48 × 342,378.12
  4. Step 4: Simplify right side
    628,857x = 297,114,184,986.90
  5. Step 5: Solve for x
    x = 297,114,184,986.90/628,857
  6. Step 6: Final answer
    x = 472,467.01

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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.