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Finding the Fourth Proportional to 282,997.80, 390,534.78 and 155,670.60

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Solution

The fourth proportional to 282,997.80, 390,534.78 and 155,670.60 is: 214,824.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,997.80 : 390,534.78 = 155,670.60 : x
  2. Step 2: Convert to fraction form
    282,997.80/390,534.78 = 155,670.60/x
  3. Step 3: Cross multiply
    282,997.80x = 390,534.78 × 155,670.60
  4. Step 4: Simplify right side
    282,997.80x = 60,794,783,523.47
  5. Step 5: Solve for x
    x = 60,794,783,523.47/282,997.80
  6. Step 6: Final answer
    x = 214,824.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.