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Finding the Fourth Proportional to 254,220.60, 381,330.90 and 212,748.60

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Solution

The fourth proportional to 254,220.60, 381,330.90 and 212,748.60 is: 319,122.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,220.60 : 381,330.90 = 212,748.60 : x
  2. Step 2: Convert to fraction form
    254,220.60/381,330.90 = 212,748.60/x
  3. Step 3: Cross multiply
    254,220.60x = 381,330.90 × 212,748.60
  4. Step 4: Simplify right side
    254,220.60x = 81,127,615,111.74
  5. Step 5: Solve for x
    x = 81,127,615,111.74/254,220.60
  6. Step 6: Final answer
    x = 319,122.90

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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.