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Finding the Fourth Proportional to 646,701.69, 892,475.87 and 360,221.70

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Solution

The fourth proportional to 646,701.69, 892,475.87 and 360,221.70 is: 497,121.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,701.69 : 892,475.87 = 360,221.70 : x
  2. Step 2: Convert to fraction form
    646,701.69/892,475.87 = 360,221.70/x
  3. Step 3: Cross multiply
    646,701.69x = 892,475.87 × 360,221.70
  4. Step 4: Simplify right side
    646,701.69x = 321,489,173,299.27
  5. Step 5: Solve for x
    x = 321,489,173,299.27/646,701.69
  6. Step 6: Final answer
    x = 497,121.28

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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.