Home / 811,019.40-1,119,161.63-448,421.51

Finding the Fourth Proportional to 811,019.40, 1,119,161.63 and 448,421.51

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Solution

The fourth proportional to 811,019.40, 1,119,161.63 and 448,421.51 is: 618,796.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,019.40 : 1,119,161.63 = 448,421.51 : x
  2. Step 2: Convert to fraction form
    811,019.40/1,119,161.63 = 448,421.51/x
  3. Step 3: Cross multiply
    811,019.40x = 1,119,161.63 × 448,421.51
  4. Step 4: Simplify right side
    811,019.40x = 501,856,143,583.91
  5. Step 5: Solve for x
    x = 501,856,143,583.91/811,019.40
  6. Step 6: Final answer
    x = 618,796.72

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Double scale
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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.