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Finding the Fourth Proportional to 484,368.21, 668,352.42 and 280,379.16

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Solution

The fourth proportional to 484,368.21, 668,352.42 and 280,379.16 is: 386,879.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,368.21 : 668,352.42 = 280,379.16 : x
  2. Step 2: Convert to fraction form
    484,368.21/668,352.42 = 280,379.16/x
  3. Step 3: Cross multiply
    484,368.21x = 668,352.42 × 280,379.16
  4. Step 4: Simplify right side
    484,368.21x = 187,392,090,103.57
  5. Step 5: Solve for x
    x = 187,392,090,103.57/484,368.21
  6. Step 6: Final answer
    x = 386,879.42

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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.