Home / 811,718.82-1,216,248.39-432,236.64

Finding the Fourth Proportional to 811,718.82, 1,216,248.39 and 432,236.64

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Solution

The fourth proportional to 811,718.82, 1,216,248.39 and 432,236.64 is: 647,646.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,718.82 : 1,216,248.39 = 432,236.64 : x
  2. Step 2: Convert to fraction form
    811,718.82/1,216,248.39 = 432,236.64/x
  3. Step 3: Cross multiply
    811,718.82x = 1,216,248.39 × 432,236.64
  4. Step 4: Simplify right side
    811,718.82x = 525,707,117,499.01
  5. Step 5: Solve for x
    x = 525,707,117,499.01/811,718.82
  6. Step 6: Final answer
    x = 647,646.83

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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.