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Finding the Fourth Proportional to 628,821.63, 867,750.57 and 342,335.97

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Solution

The fourth proportional to 628,821.63, 867,750.57 and 342,335.97 is: 472,410.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,821.63 : 867,750.57 = 342,335.97 : x
  2. Step 2: Convert to fraction form
    628,821.63/867,750.57 = 342,335.97/x
  3. Step 3: Cross multiply
    628,821.63x = 867,750.57 × 342,335.97
  4. Step 4: Simplify right side
    628,821.63x = 297,062,233,099.00
  5. Step 5: Solve for x
    x = 297,062,233,099.00/628,821.63
  6. Step 6: Final answer
    x = 472,410.97

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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.