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Finding the Fourth Proportional to 328,511.80, 492,767.70 and 287,833.60

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Solution

The fourth proportional to 328,511.80, 492,767.70 and 287,833.60 is: 431,750.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,511.80 : 492,767.70 = 287,833.60 : x
  2. Step 2: Convert to fraction form
    328,511.80/492,767.70 = 287,833.60/x
  3. Step 3: Cross multiply
    328,511.80x = 492,767.70 × 287,833.60
  4. Step 4: Simplify right side
    328,511.80x = 141,835,101,054.72
  5. Step 5: Solve for x
    x = 141,835,101,054.72/328,511.80
  6. Step 6: Final answer
    x = 431,750.40

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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.