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Finding the Fourth Proportional to 660,824.75, 911,993.85 and 370,431.65

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Solution

The fourth proportional to 660,824.75, 911,993.85 and 370,431.65 is: 511,226.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,824.75 : 911,993.85 = 370,431.65 : x
  2. Step 2: Convert to fraction form
    660,824.75/911,993.85 = 370,431.65/x
  3. Step 3: Cross multiply
    660,824.75x = 911,993.85 × 370,431.65
  4. Step 4: Simplify right side
    660,824.75x = 337,831,388,925.34
  5. Step 5: Solve for x
    x = 337,831,388,925.34/660,824.75
  6. Step 6: Final answer
    x = 511,226.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.