Home / 628,738.81-867,664.91-342,258.21

Finding the Fourth Proportional to 628,738.81, 867,664.91 and 342,258.21

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Solution

The fourth proportional to 628,738.81, 867,664.91 and 342,258.21 is: 472,319.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,738.81 : 867,664.91 = 342,258.21 : x
  2. Step 2: Convert to fraction form
    628,738.81/867,664.91 = 342,258.21/x
  3. Step 3: Cross multiply
    628,738.81x = 867,664.91 × 342,258.21
  4. Step 4: Simplify right side
    628,738.81x = 296,965,439,832.06
  5. Step 5: Solve for x
    x = 296,965,439,832.06/628,738.81
  6. Step 6: Final answer
    x = 472,319.25

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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.