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Finding the Fourth Proportional to 613,405.80, 920,108.70 and 347,685.30

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Solution

The fourth proportional to 613,405.80, 920,108.70 and 347,685.30 is: 521,527.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,405.80 : 920,108.70 = 347,685.30 : x
  2. Step 2: Convert to fraction form
    613,405.80/920,108.70 = 347,685.30/x
  3. Step 3: Cross multiply
    613,405.80x = 920,108.70 × 347,685.30
  4. Step 4: Simplify right side
    613,405.80x = 319,908,269,392.11
  5. Step 5: Solve for x
    x = 319,908,269,392.11/613,405.80
  6. Step 6: Final answer
    x = 521,527.95

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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.