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Finding the Fourth Proportional to 328,313.64, 492,470.40 and 78,995.64

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Solution

The fourth proportional to 328,313.64, 492,470.40 and 78,995.64 is: 118,493.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,313.64 : 492,470.40 = 78,995.64 : x
  2. Step 2: Convert to fraction form
    328,313.64/492,470.40 = 78,995.64/x
  3. Step 3: Cross multiply
    328,313.64x = 492,470.40 × 78,995.64
  4. Step 4: Simplify right side
    328,313.64x = 38,903,014,429.06
  5. Step 5: Solve for x
    x = 38,903,014,429.06/328,313.64
  6. Step 6: Final answer
    x = 118,493.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.