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Finding the Fourth Proportional to 388,407.40, 582,630.30 and 201,783.40

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Solution

The fourth proportional to 388,407.40, 582,630.30 and 201,783.40 is: 302,685.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,407.40 : 582,630.30 = 201,783.40 : x
  2. Step 2: Convert to fraction form
    388,407.40/582,630.30 = 201,783.40/x
  3. Step 3: Cross multiply
    388,407.40x = 582,630.30 × 201,783.40
  4. Step 4: Simplify right side
    388,407.40x = 117,565,122,877.02
  5. Step 5: Solve for x
    x = 117,565,122,877.02/388,407.40
  6. Step 6: Final answer
    x = 302,685.07

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.