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Finding the Fourth Proportional to 328,458.36, 492,687.96 and 79,140.36

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Solution

The fourth proportional to 328,458.36, 492,687.96 and 79,140.36 is: 118,710.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,458.36 : 492,687.96 = 79,140.36 : x
  2. Step 2: Convert to fraction form
    328,458.36/492,687.96 = 79,140.36/x
  3. Step 3: Cross multiply
    328,458.36x = 492,687.96 × 79,140.36
  4. Step 4: Simplify right side
    328,458.36x = 38,991,502,522.07
  5. Step 5: Solve for x
    x = 38,991,502,522.07/328,458.36
  6. Step 6: Final answer
    x = 118,710.64

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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.