Home / 811,206.30-1,216,716.51-212,225.28

Finding the Fourth Proportional to 811,206.30, 1,216,716.51 and 212,225.28

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Solution

The fourth proportional to 811,206.30, 1,216,716.51 and 212,225.28 is: 318,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,206.30 : 1,216,716.51 = 212,225.28 : x
  2. Step 2: Convert to fraction form
    811,206.30/1,216,716.51 = 212,225.28/x
  3. Step 3: Cross multiply
    811,206.30x = 1,216,716.51 × 212,225.28
  4. Step 4: Simplify right side
    811,206.30x = 258,217,996,656.84
  5. Step 5: Solve for x
    x = 258,217,996,656.84/811,206.30
  6. Step 6: Final answer
    x = 318,313.60

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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.