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Finding the Fourth Proportional to 400,390.80, 601,277.40 and 213,766.80

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Solution

The fourth proportional to 400,390.80, 601,277.40 and 213,766.80 is: 321,019.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,390.80 : 601,277.40 = 213,766.80 : x
  2. Step 2: Convert to fraction form
    400,390.80/601,277.40 = 213,766.80/x
  3. Step 3: Cross multiply
    400,390.80x = 601,277.40 × 213,766.80
  4. Step 4: Simplify right side
    400,390.80x = 128,533,145,710.32
  5. Step 5: Solve for x
    x = 128,533,145,710.32/400,390.80
  6. Step 6: Final answer
    x = 321,019.23

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1.5x scale

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.