Home / 1,119,138.40-1,679,168.76-821,138.32

Finding the Fourth Proportional to 1,119,138.40, 1,679,168.76 and 821,138.32

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Solution

The fourth proportional to 1,119,138.40, 1,679,168.76 and 821,138.32 is: 1,232,045.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,119,138.40 : 1,679,168.76 = 821,138.32 : x
  2. Step 2: Convert to fraction form
    1,119,138.40/1,679,168.76 = 821,138.32/x
  3. Step 3: Cross multiply
    1,119,138.40x = 1,679,168.76 × 821,138.32
  4. Step 4: Simplify right side
    1,119,138.40x = 1,378,829,814,582.88
  5. Step 5: Solve for x
    x = 1,378,829,814,582.88/1,119,138.40
  6. Step 6: Final answer
    x = 1,232,045.84

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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.