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Finding the Fourth Proportional to 312,318.45, 430,998.98 and 169,078.46

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Solution

The fourth proportional to 312,318.45, 430,998.98 and 169,078.46 is: 233,328.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,318.45 : 430,998.98 = 169,078.46 : x
  2. Step 2: Convert to fraction form
    312,318.45/430,998.98 = 169,078.46/x
  3. Step 3: Cross multiply
    312,318.45x = 430,998.98 × 169,078.46
  4. Step 4: Simplify right side
    312,318.45x = 72,872,640,799.58
  5. Step 5: Solve for x
    x = 72,872,640,799.58/312,318.45
  6. Step 6: Final answer
    x = 233,328.00

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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.