Home / 764,479.80-1,054,890.54-420,258.96

Finding the Fourth Proportional to 764,479.80, 1,054,890.54 and 420,258.96

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Solution

The fourth proportional to 764,479.80, 1,054,890.54 and 420,258.96 is: 579,907.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,479.80 : 1,054,890.54 = 420,258.96 : x
  2. Step 2: Convert to fraction form
    764,479.80/1,054,890.54 = 420,258.96/x
  3. Step 3: Cross multiply
    764,479.80x = 1,054,890.54 × 420,258.96
  4. Step 4: Simplify right side
    764,479.80x = 443,327,201,254.24
  5. Step 5: Solve for x
    x = 443,327,201,254.24/764,479.80
  6. Step 6: Final answer
    x = 579,907.02

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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.