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Finding the Fourth Proportional to 863,649.40, 1,191,782.41 and 476,469.81

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Solution

The fourth proportional to 863,649.40, 1,191,782.41 and 476,469.81 is: 657,498.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,649.40 : 1,191,782.41 = 476,469.81 : x
  2. Step 2: Convert to fraction form
    863,649.40/1,191,782.41 = 476,469.81/x
  3. Step 3: Cross multiply
    863,649.40x = 1,191,782.41 × 476,469.81
  4. Step 4: Simplify right side
    863,649.40x = 567,848,338,454.04
  5. Step 5: Solve for x
    x = 567,848,338,454.04/863,649.40
  6. Step 6: Final answer
    x = 657,498.68

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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.