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Finding the Fourth Proportional to 553,348.40, 830,800.20 and 343,396.40

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Solution

The fourth proportional to 553,348.40, 830,800.20 and 343,396.40 is: 515,577.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,348.40 : 830,800.20 = 343,396.40 : x
  2. Step 2: Convert to fraction form
    553,348.40/830,800.20 = 343,396.40/x
  3. Step 3: Cross multiply
    553,348.40x = 830,800.20 × 343,396.40
  4. Step 4: Simplify right side
    553,348.40x = 285,293,797,799.28
  5. Step 5: Solve for x
    x = 285,293,797,799.28/553,348.40
  6. Step 6: Final answer
    x = 515,577.16

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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.