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Finding the Fourth Proportional to 328,287.48, 492,431.22 and 78,969.48

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Solution

The fourth proportional to 328,287.48, 492,431.22 and 78,969.48 is: 118,454.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,287.48 : 492,431.22 = 78,969.48 : x
  2. Step 2: Convert to fraction form
    328,287.48/492,431.22 = 78,969.48/x
  3. Step 3: Cross multiply
    328,287.48x = 492,431.22 × 78,969.48
  4. Step 4: Simplify right side
    328,287.48x = 38,887,037,379.17
  5. Step 5: Solve for x
    x = 38,887,037,379.17/328,287.48
  6. Step 6: Final answer
    x = 118,454.22

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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.