Home / 628,739.21-867,660.14-342,261.38

Finding the Fourth Proportional to 628,739.21, 867,660.14 and 342,261.38

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Solution

The fourth proportional to 628,739.21, 867,660.14 and 342,261.38 is: 472,320.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,739.21 : 867,660.14 = 342,261.38 : x
  2. Step 2: Convert to fraction form
    628,739.21/867,660.14 = 342,261.38/x
  3. Step 3: Cross multiply
    628,739.21x = 867,660.14 × 342,261.38
  4. Step 4: Simplify right side
    628,739.21x = 296,966,556,887.39
  5. Step 5: Solve for x
    x = 296,966,556,887.39/628,739.21
  6. Step 6: Final answer
    x = 472,320.72

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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.