Home / 811,679.40-1,120,118.76-449,118.54

Finding the Fourth Proportional to 811,679.40, 1,120,118.76 and 449,118.54

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Solution

The fourth proportional to 811,679.40, 1,120,118.76 and 449,118.54 is: 619,784.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,679.40 : 1,120,118.76 = 449,118.54 : x
  2. Step 2: Convert to fraction form
    811,679.40/1,120,118.76 = 449,118.54/x
  3. Step 3: Cross multiply
    811,679.40x = 1,120,118.76 × 449,118.54
  4. Step 4: Simplify right side
    811,679.40x = 503,066,102,117.81
  5. Step 5: Solve for x
    x = 503,066,102,117.81/811,679.40
  6. Step 6: Final answer
    x = 619,784.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.