Home / 628,739.52-867,669.60-342,268.56

Finding the Fourth Proportional to 628,739.52, 867,669.60 and 342,268.56

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Solution

The fourth proportional to 628,739.52, 867,669.60 and 342,268.56 is: 472,335.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,739.52 : 867,669.60 = 342,268.56 : x
  2. Step 2: Convert to fraction form
    628,739.52/867,669.60 = 342,268.56/x
  3. Step 3: Cross multiply
    628,739.52x = 867,669.60 × 342,268.56
  4. Step 4: Simplify right side
    628,739.52x = 296,976,024,547.78
  5. Step 5: Solve for x
    x = 296,976,024,547.78/628,739.52
  6. Step 6: Final answer
    x = 472,335.55

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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.