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Finding the Fourth Proportional to 808,679.70, 1,213,019.55 and 310,043.70

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Solution

The fourth proportional to 808,679.70, 1,213,019.55 and 310,043.70 is: 465,065.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    808,679.70 : 1,213,019.55 = 310,043.70 : x
  2. Step 2: Convert to fraction form
    808,679.70/1,213,019.55 = 310,043.70/x
  3. Step 3: Cross multiply
    808,679.70x = 1,213,019.55 × 310,043.70
  4. Step 4: Simplify right side
    808,679.70x = 376,089,069,454.34
  5. Step 5: Solve for x
    x = 376,089,069,454.34/808,679.70
  6. Step 6: Final answer
    x = 465,065.55

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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.