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Finding the Fourth Proportional to 613,425.80, 920,138.70 and 347,705.30

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Solution

The fourth proportional to 613,425.80, 920,138.70 and 347,705.30 is: 521,557.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,425.80 : 920,138.70 = 347,705.30 : x
  2. Step 2: Convert to fraction form
    613,425.80/920,138.70 = 347,705.30/x
  3. Step 3: Cross multiply
    613,425.80x = 920,138.70 × 347,705.30
  4. Step 4: Simplify right side
    613,425.80x = 319,937,102,725.11
  5. Step 5: Solve for x
    x = 319,937,102,725.11/613,425.80
  6. Step 6: Final answer
    x = 521,557.95

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Similar ratio
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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.