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Finding the Fourth Proportional to 382,685.06, 528,090.90 and 212,915.54

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Solution

The fourth proportional to 382,685.06, 528,090.90 and 212,915.54 is: 293,815.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    382,685.06 : 528,090.90 = 212,915.54 : x
  2. Step 2: Convert to fraction form
    382,685.06/528,090.90 = 212,915.54/x
  3. Step 3: Cross multiply
    382,685.06x = 528,090.90 × 212,915.54
  4. Step 4: Simplify right side
    382,685.06x = 112,438,759,142.59
  5. Step 5: Solve for x
    x = 112,438,759,142.59/382,685.06
  6. Step 6: Final answer
    x = 293,815.39

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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.