Home / 390,940.08-539,548.20-218,923.56

Finding the Fourth Proportional to 390,940.08, 539,548.20 and 218,923.56

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Solution

The fourth proportional to 390,940.08, 539,548.20 and 218,923.56 is: 302,143.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,940.08 : 539,548.20 = 218,923.56 : x
  2. Step 2: Convert to fraction form
    390,940.08/539,548.20 = 218,923.56/x
  3. Step 3: Cross multiply
    390,940.08x = 539,548.20 × 218,923.56
  4. Step 4: Simplify right side
    390,940.08x = 118,119,812,735.59
  5. Step 5: Solve for x
    x = 118,119,812,735.59/390,940.08
  6. Step 6: Final answer
    x = 302,143.01

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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.