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Finding the Fourth Proportional to 328,437.36, 492,656.28 and 79,119.60

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Solution

The fourth proportional to 328,437.36, 492,656.28 and 79,119.60 is: 118,679.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,437.36 : 492,656.28 = 79,119.60 : x
  2. Step 2: Convert to fraction form
    328,437.36/492,656.28 = 79,119.60/x
  3. Step 3: Cross multiply
    328,437.36x = 492,656.28 × 79,119.60
  4. Step 4: Simplify right side
    328,437.36x = 38,978,767,811.09
  5. Step 5: Solve for x
    x = 38,978,767,811.09/328,437.36
  6. Step 6: Final answer
    x = 118,679.46

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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.