Home / 398,923.04-598,417.44-287,123.60

Finding the Fourth Proportional to 398,923.04, 598,417.44 and 287,123.60

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Solution

The fourth proportional to 398,923.04, 598,417.44 and 287,123.60 is: 430,709.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,923.04 : 598,417.44 = 287,123.60 : x
  2. Step 2: Convert to fraction form
    398,923.04/598,417.44 = 287,123.60/x
  3. Step 3: Cross multiply
    398,923.04x = 598,417.44 × 287,123.60
  4. Step 4: Simplify right side
    398,923.04x = 171,819,769,675.58
  5. Step 5: Solve for x
    x = 171,819,769,675.58/398,923.04
  6. Step 6: Final answer
    x = 430,709.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.