Home / 811,153.44-1,216,901.48-305,703.72

Finding the Fourth Proportional to 811,153.44, 1,216,901.48 and 305,703.72

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Solution

The fourth proportional to 811,153.44, 1,216,901.48 and 305,703.72 is: 458,620.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,153.44 : 1,216,901.48 = 305,703.72 : x
  2. Step 2: Convert to fraction form
    811,153.44/1,216,901.48 = 305,703.72/x
  3. Step 3: Cross multiply
    811,153.44x = 1,216,901.48 × 305,703.72
  4. Step 4: Simplify right side
    811,153.44x = 372,011,307,780.99
  5. Step 5: Solve for x
    x = 372,011,307,780.99/811,153.44
  6. Step 6: Final answer
    x = 458,620.14

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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.