Home / 1,210,303.80-1,815,455.70-811,135.80

Finding the Fourth Proportional to 1,210,303.80, 1,815,455.70 and 811,135.80

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Solution

The fourth proportional to 1,210,303.80, 1,815,455.70 and 811,135.80 is: 1,216,703.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,303.80 : 1,815,455.70 = 811,135.80 : x
  2. Step 2: Convert to fraction form
    1,210,303.80/1,815,455.70 = 811,135.80/x
  3. Step 3: Cross multiply
    1,210,303.80x = 1,815,455.70 × 811,135.80
  4. Step 4: Simplify right side
    1,210,303.80x = 1,472,581,111,584.06
  5. Step 5: Solve for x
    x = 1,472,581,111,584.06/1,210,303.80
  6. Step 6: Final answer
    x = 1,216,703.70

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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.