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Finding the Fourth Proportional to 628,736.49, 867,656.45 and 342,258.73

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Solution

The fourth proportional to 628,736.49, 867,656.45 and 342,258.73 is: 472,317.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,736.49 : 867,656.45 = 342,258.73 : x
  2. Step 2: Convert to fraction form
    628,736.49/867,656.45 = 342,258.73/x
  3. Step 3: Cross multiply
    628,736.49x = 867,656.45 × 342,258.73
  4. Step 4: Simplify right side
    628,736.49x = 296,962,993,339.81
  5. Step 5: Solve for x
    x = 296,962,993,339.81/628,736.49
  6. Step 6: Final answer
    x = 472,317.10

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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.