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Finding the Fourth Proportional to 553,380.40, 830,848.20 and 343,428.40

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Solution

The fourth proportional to 553,380.40, 830,848.20 and 343,428.40 is: 515,625.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,380.40 : 830,848.20 = 343,428.40 : x
  2. Step 2: Convert to fraction form
    553,380.40/830,848.20 = 343,428.40/x
  3. Step 3: Cross multiply
    553,380.40x = 830,848.20 × 343,428.40
  4. Step 4: Simplify right side
    553,380.40x = 285,336,867,968.88
  5. Step 5: Solve for x
    x = 285,336,867,968.88/553,380.40
  6. Step 6: Final answer
    x = 515,625.18

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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.