Home / 254,811.40-382,217.10-128,840.20

Finding the Fourth Proportional to 254,811.40, 382,217.10 and 128,840.20

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Solution

The fourth proportional to 254,811.40, 382,217.10 and 128,840.20 is: 193,260.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    254,811.40 : 382,217.10 = 128,840.20 : x
  2. Step 2: Convert to fraction form
    254,811.40/382,217.10 = 128,840.20/x
  3. Step 3: Cross multiply
    254,811.40x = 382,217.10 × 128,840.20
  4. Step 4: Simplify right side
    254,811.40x = 49,244,927,607.42
  5. Step 5: Solve for x
    x = 49,244,927,607.42/254,811.40
  6. Step 6: Final answer
    x = 193,260.30

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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.