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Finding the Fourth Proportional to 260,028.40, 390,042.60 and 214,927.60

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Solution

The fourth proportional to 260,028.40, 390,042.60 and 214,927.60 is: 322,391.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,028.40 : 390,042.60 = 214,927.60 : x
  2. Step 2: Convert to fraction form
    260,028.40/390,042.60 = 214,927.60/x
  3. Step 3: Cross multiply
    260,028.40x = 390,042.60 × 214,927.60
  4. Step 4: Simplify right side
    260,028.40x = 83,830,919,915.76
  5. Step 5: Solve for x
    x = 83,830,919,915.76/260,028.40
  6. Step 6: Final answer
    x = 322,391.40

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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.