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Finding the Fourth Proportional to 341,994.80, 512,992.20 and 128,762.30

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Solution

The fourth proportional to 341,994.80, 512,992.20 and 128,762.30 is: 193,143.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    341,994.80 : 512,992.20 = 128,762.30 : x
  2. Step 2: Convert to fraction form
    341,994.80/512,992.20 = 128,762.30/x
  3. Step 3: Cross multiply
    341,994.80x = 512,992.20 × 128,762.30
  4. Step 4: Simplify right side
    341,994.80x = 66,054,055,554.06
  5. Step 5: Solve for x
    x = 66,054,055,554.06/341,994.80
  6. Step 6: Final answer
    x = 193,143.45

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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.