Home / 1,380,588.64-1,905,800.20-928,142.08

Finding the Fourth Proportional to 1,380,588.64, 1,905,800.20 and 928,142.08

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Solution

The fourth proportional to 1,380,588.64, 1,905,800.20 and 928,142.08 is: 1,281,231.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,588.64 : 1,905,800.20 = 928,142.08 : x
  2. Step 2: Convert to fraction form
    1,380,588.64/1,905,800.20 = 928,142.08/x
  3. Step 3: Cross multiply
    1,380,588.64x = 1,905,800.20 × 928,142.08
  4. Step 4: Simplify right side
    1,380,588.64x = 1,768,853,361,692.42
  5. Step 5: Solve for x
    x = 1,768,853,361,692.42/1,380,588.64
  6. Step 6: Final answer
    x = 1,281,231.29

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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.