Home / 648,290.08-971,931.49-420,103.66

Finding the Fourth Proportional to 648,290.08, 971,931.49 and 420,103.66

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Solution

The fourth proportional to 648,290.08, 971,931.49 and 420,103.66 is: 629,829.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,290.08 : 971,931.49 = 420,103.66 : x
  2. Step 2: Convert to fraction form
    648,290.08/971,931.49 = 420,103.66/x
  3. Step 3: Cross multiply
    648,290.08x = 971,931.49 × 420,103.66
  4. Step 4: Simplify right side
    648,290.08x = 408,311,978,648.08
  5. Step 5: Solve for x
    x = 408,311,978,648.08/648,290.08
  6. Step 6: Final answer
    x = 629,829.13

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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.