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Finding the Fourth Proportional to 553,378.20, 830,067.30 and 313,245.60

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Solution

The fourth proportional to 553,378.20, 830,067.30 and 313,245.60 is: 469,868.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,378.20 : 830,067.30 = 313,245.60 : x
  2. Step 2: Convert to fraction form
    553,378.20/830,067.30 = 313,245.60/x
  3. Step 3: Cross multiply
    553,378.20x = 830,067.30 × 313,245.60
  4. Step 4: Simplify right side
    553,378.20x = 260,014,929,428.88
  5. Step 5: Solve for x
    x = 260,014,929,428.88/553,378.20
  6. Step 6: Final answer
    x = 469,868.40

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Similar ratio
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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.