Home / 810,005.40-1,215,008.10-757,128.60

Finding the Fourth Proportional to 810,005.40, 1,215,008.10 and 757,128.60

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Solution

The fourth proportional to 810,005.40, 1,215,008.10 and 757,128.60 is: 1,135,692.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,005.40 : 1,215,008.10 = 757,128.60 : x
  2. Step 2: Convert to fraction form
    810,005.40/1,215,008.10 = 757,128.60/x
  3. Step 3: Cross multiply
    810,005.40x = 1,215,008.10 × 757,128.60
  4. Step 4: Simplify right side
    810,005.40x = 919,917,381,741.66
  5. Step 5: Solve for x
    x = 919,917,381,741.66/810,005.40
  6. Step 6: Final answer
    x = 1,135,692.90

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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.