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Finding the Fourth Proportional to 643,620.64, 965,518.64 and 373,875.36

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Solution

The fourth proportional to 643,620.64, 965,518.64 and 373,875.36 is: 560,863.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,620.64 : 965,518.64 = 373,875.36 : x
  2. Step 2: Convert to fraction form
    643,620.64/965,518.64 = 373,875.36/x
  3. Step 3: Cross multiply
    643,620.64x = 965,518.64 × 373,875.36
  4. Step 4: Simplify right side
    643,620.64x = 360,983,629,116.71
  5. Step 5: Solve for x
    x = 360,983,629,116.71/643,620.64
  6. Step 6: Final answer
    x = 560,863.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.