Home / 810,918.75-1,215,197.13-389,702.55

Finding the Fourth Proportional to 810,918.75, 1,215,197.13 and 389,702.55

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Solution

The fourth proportional to 810,918.75, 1,215,197.13 and 389,702.55 is: 583,986.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,918.75 : 1,215,197.13 = 389,702.55 : x
  2. Step 2: Convert to fraction form
    810,918.75/1,215,197.13 = 389,702.55/x
  3. Step 3: Cross multiply
    810,918.75x = 1,215,197.13 × 389,702.55
  4. Step 4: Simplify right side
    810,918.75x = 473,565,420,313.68
  5. Step 5: Solve for x
    x = 473,565,420,313.68/810,918.75
  6. Step 6: Final answer
    x = 583,986.28

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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.