Home / 764,439.11-1,054,926.63-420,280.89

Finding the Fourth Proportional to 764,439.11, 1,054,926.63 and 420,280.89

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Solution

The fourth proportional to 764,439.11, 1,054,926.63 and 420,280.89 is: 579,987.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,439.11 : 1,054,926.63 = 420,280.89 : x
  2. Step 2: Convert to fraction form
    764,439.11/1,054,926.63 = 420,280.89/x
  3. Step 3: Cross multiply
    764,439.11x = 1,054,926.63 × 420,280.89
  4. Step 4: Simplify right side
    764,439.11x = 443,365,502,941.10
  5. Step 5: Solve for x
    x = 443,365,502,941.10/764,439.11
  6. Step 6: Final answer
    x = 579,987.99

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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.