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Finding the Fourth Proportional to 315,400.56, 435,187.80 and 181,238.64

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Solution

The fourth proportional to 315,400.56, 435,187.80 and 181,238.64 is: 250,071.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,400.56 : 435,187.80 = 181,238.64 : x
  2. Step 2: Convert to fraction form
    315,400.56/435,187.80 = 181,238.64/x
  3. Step 3: Cross multiply
    315,400.56x = 435,187.80 × 181,238.64
  4. Step 4: Simplify right side
    315,400.56x = 78,872,845,016.59
  5. Step 5: Solve for x
    x = 78,872,845,016.59/315,400.56
  6. Step 6: Final answer
    x = 250,071.99

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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.