Home / 310,730.22-428,840.60-189,942.21

Finding the Fourth Proportional to 310,730.22, 428,840.60 and 189,942.21

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Solution

The fourth proportional to 310,730.22, 428,840.60 and 189,942.21 is: 262,140.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,730.22 : 428,840.60 = 189,942.21 : x
  2. Step 2: Convert to fraction form
    310,730.22/428,840.60 = 189,942.21/x
  3. Step 3: Cross multiply
    310,730.22x = 428,840.60 × 189,942.21
  4. Step 4: Simplify right side
    310,730.22x = 81,454,931,776.58
  5. Step 5: Solve for x
    x = 81,454,931,776.58/310,730.22
  6. Step 6: Final answer
    x = 262,140.36

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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.