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Finding the Fourth Proportional to 328,570.80, 492,856.20 and 285,268.20

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Solution

The fourth proportional to 328,570.80, 492,856.20 and 285,268.20 is: 427,902.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,570.80 : 492,856.20 = 285,268.20 : x
  2. Step 2: Convert to fraction form
    328,570.80/492,856.20 = 285,268.20/x
  3. Step 3: Cross multiply
    328,570.80x = 492,856.20 × 285,268.20
  4. Step 4: Simplify right side
    328,570.80x = 140,596,201,032.84
  5. Step 5: Solve for x
    x = 140,596,201,032.84/328,570.80
  6. Step 6: Final answer
    x = 427,902.30

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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.