Home / 811,019.53-1,119,161.81-448,421.63

Finding the Fourth Proportional to 811,019.53, 1,119,161.81 and 448,421.63

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Solution

The fourth proportional to 811,019.53, 1,119,161.81 and 448,421.63 is: 618,796.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,019.53 : 1,119,161.81 = 448,421.63 : x
  2. Step 2: Convert to fraction form
    811,019.53/1,119,161.81 = 448,421.63/x
  3. Step 3: Cross multiply
    811,019.53x = 1,119,161.81 × 448,421.63
  4. Step 4: Simplify right side
    811,019.53x = 501,856,360,831.84
  5. Step 5: Solve for x
    x = 501,856,360,831.84/811,019.53
  6. Step 6: Final answer
    x = 618,796.89

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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.