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Finding the Fourth Proportional to 665,020.80, 997,660.80 and 285,940.80

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Solution

The fourth proportional to 665,020.80, 997,660.80 and 285,940.80 is: 428,966.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,020.80 : 997,660.80 = 285,940.80 : x
  2. Step 2: Convert to fraction form
    665,020.80/997,660.80 = 285,940.80/x
  3. Step 3: Cross multiply
    665,020.80x = 997,660.80 × 285,940.80
  4. Step 4: Simplify right side
    665,020.80x = 285,271,927,280.64
  5. Step 5: Solve for x
    x = 285,271,927,280.64/665,020.80
  6. Step 6: Final answer
    x = 428,966.92

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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.