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Finding the Fourth Proportional to 401,093.20, 601,639.80 and 398,328.40

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Solution

The fourth proportional to 401,093.20, 601,639.80 and 398,328.40 is: 597,492.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,093.20 : 601,639.80 = 398,328.40 : x
  2. Step 2: Convert to fraction form
    401,093.20/601,639.80 = 398,328.40/x
  3. Step 3: Cross multiply
    401,093.20x = 601,639.80 × 398,328.40
  4. Step 4: Simplify right side
    401,093.20x = 239,650,218,910.32
  5. Step 5: Solve for x
    x = 239,650,218,910.32/401,093.20
  6. Step 6: Final answer
    x = 597,492.60

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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.