Home / 811,208.72-1,216,720.10-212,227.68

Finding the Fourth Proportional to 811,208.72, 1,216,720.10 and 212,227.68

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Solution

The fourth proportional to 811,208.72, 1,216,720.10 and 212,227.68 is: 318,317.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,208.72 : 1,216,720.10 = 212,227.68 : x
  2. Step 2: Convert to fraction form
    811,208.72/1,216,720.10 = 212,227.68/x
  3. Step 3: Cross multiply
    811,208.72x = 1,216,720.10 × 212,227.68
  4. Step 4: Simplify right side
    811,208.72x = 258,221,684,032.37
  5. Step 5: Solve for x
    x = 258,221,684,032.37/811,208.72
  6. Step 6: Final answer
    x = 318,317.19

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1.5x scale

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.