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Finding the Fourth Proportional to 328,189.56, 492,284.22 and 78,871.56

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Solution

The fourth proportional to 328,189.56, 492,284.22 and 78,871.56 is: 118,307.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,189.56 : 492,284.22 = 78,871.56 : x
  2. Step 2: Convert to fraction form
    328,189.56/492,284.22 = 78,871.56/x
  3. Step 3: Cross multiply
    328,189.56x = 492,284.22 × 78,871.56
  4. Step 4: Simplify right side
    328,189.56x = 38,827,224,394.78
  5. Step 5: Solve for x
    x = 38,827,224,394.78/328,189.56
  6. Step 6: Final answer
    x = 118,307.31

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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.