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Finding the Fourth Proportional to 628,508.65, 867,340.32 and 342,028.66

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Solution

The fourth proportional to 628,508.65, 867,340.32 and 342,028.66 is: 471,998.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,508.65 : 867,340.32 = 342,028.66 : x
  2. Step 2: Convert to fraction form
    628,508.65/867,340.32 = 342,028.66/x
  3. Step 3: Cross multiply
    628,508.65x = 867,340.32 × 342,028.66
  4. Step 4: Simplify right side
    628,508.65x = 296,655,247,413.57
  5. Step 5: Solve for x
    x = 296,655,247,413.57/628,508.65
  6. Step 6: Final answer
    x = 471,998.67

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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.