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Finding the Fourth Proportional to 310,639.41, 428,826.81 and 234,189.58

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Solution

The fourth proportional to 310,639.41, 428,826.81 and 234,189.58 is: 323,290.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,639.41 : 428,826.81 = 234,189.58 : x
  2. Step 2: Convert to fraction form
    310,639.41/428,826.81 = 234,189.58/x
  3. Step 3: Cross multiply
    310,639.41x = 428,826.81 × 234,189.58
  4. Step 4: Simplify right side
    310,639.41x = 100,426,770,526.64
  5. Step 5: Solve for x
    x = 100,426,770,526.64/310,639.41
  6. Step 6: Final answer
    x = 323,290.50

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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.