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Finding the Fourth Proportional to 811,393.69, 1,119,371.46 and 488,920.54

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Solution

The fourth proportional to 811,393.69, 1,119,371.46 and 488,920.54 is: 674,498.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,393.69 : 1,119,371.46 = 488,920.54 : x
  2. Step 2: Convert to fraction form
    811,393.69/1,119,371.46 = 488,920.54/x
  3. Step 3: Cross multiply
    811,393.69x = 1,119,371.46 × 488,920.54
  4. Step 4: Simplify right side
    811,393.69x = 547,283,698,683.79
  5. Step 5: Solve for x
    x = 547,283,698,683.79/811,393.69
  6. Step 6: Final answer
    x = 674,498.34

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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.