Home / 919,071.95-1,268,297.12-511,172.55

Finding the Fourth Proportional to 919,071.95, 1,268,297.12 and 511,172.55

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Solution

The fourth proportional to 919,071.95, 1,268,297.12 and 511,172.55 is: 705,405.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,071.95 : 1,268,297.12 = 511,172.55 : x
  2. Step 2: Convert to fraction form
    919,071.95/1,268,297.12 = 511,172.55/x
  3. Step 3: Cross multiply
    919,071.95x = 1,268,297.12 × 511,172.55
  4. Step 4: Simplify right side
    919,071.95x = 648,318,674,265.99
  5. Step 5: Solve for x
    x = 648,318,674,265.99/919,071.95
  6. Step 6: Final answer
    x = 705,405.79

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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.