Home / 830,003.70-1,245,005.55-812,507.70

Finding the Fourth Proportional to 830,003.70, 1,245,005.55 and 812,507.70

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Solution

The fourth proportional to 830,003.70, 1,245,005.55 and 812,507.70 is: 1,218,761.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,003.70 : 1,245,005.55 = 812,507.70 : x
  2. Step 2: Convert to fraction form
    830,003.70/1,245,005.55 = 812,507.70/x
  3. Step 3: Cross multiply
    830,003.70x = 1,245,005.55 × 812,507.70
  4. Step 4: Simplify right side
    830,003.70x = 1,011,576,595,917.74
  5. Step 5: Solve for x
    x = 1,011,576,595,917.74/830,003.70
  6. Step 6: Final answer
    x = 1,218,761.55

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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.