Home / 628,738.21-867,658.76-342,260.38

Finding the Fourth Proportional to 628,738.21, 867,658.76 and 342,260.38

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Solution

The fourth proportional to 628,738.21, 867,658.76 and 342,260.38 is: 472,319.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,738.21 : 867,658.76 = 342,260.38 : x
  2. Step 2: Convert to fraction form
    628,738.21/867,658.76 = 342,260.38/x
  3. Step 3: Cross multiply
    628,738.21x = 867,658.76 × 342,260.38
  4. Step 4: Simplify right side
    628,738.21x = 296,965,216,907.93
  5. Step 5: Solve for x
    x = 296,965,216,907.93/628,738.21
  6. Step 6: Final answer
    x = 472,319.34

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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.