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Finding the Fourth Proportional to 388,561, 582,814.75 and 238,824.40

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Solution

The fourth proportional to 388,561, 582,814.75 and 238,824.40 is: 358,220.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,561 : 582,814.75 = 238,824.40 : x
  2. Step 2: Convert to fraction form
    388,561/582,814.75 = 238,824.40/x
  3. Step 3: Cross multiply
    388,561x = 582,814.75 × 238,824.40
  4. Step 4: Simplify right side
    388,561x = 139,190,382,979.90
  5. Step 5: Solve for x
    x = 139,190,382,979.90/388,561
  6. Step 6: Final answer
    x = 358,220.16

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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.