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Finding the Fourth Proportional to 628,840.45, 867,771.22 and 342,359.92

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Solution

The fourth proportional to 628,840.45, 867,771.22 and 342,359.92 is: 472,441.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,840.45 : 867,771.22 = 342,359.92 : x
  2. Step 2: Convert to fraction form
    628,840.45/867,771.22 = 342,359.92/x
  3. Step 3: Cross multiply
    628,840.45x = 867,771.22 × 342,359.92
  4. Step 4: Simplify right side
    628,840.45x = 297,090,085,457.50
  5. Step 5: Solve for x
    x = 297,090,085,457.50/628,840.45
  6. Step 6: Final answer
    x = 472,441.12

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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.