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Finding the Fourth Proportional to 782,516, 1,079,883.28 and 455,820.62

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Solution

The fourth proportional to 782,516, 1,079,883.28 and 455,820.62 is: 629,038.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    782,516 : 1,079,883.28 = 455,820.62 : x
  2. Step 2: Convert to fraction form
    782,516/1,079,883.28 = 455,820.62/x
  3. Step 3: Cross multiply
    782,516x = 1,079,883.28 × 455,820.62
  4. Step 4: Simplify right side
    782,516x = 492,233,066,217.23
  5. Step 5: Solve for x
    x = 492,233,066,217.23/782,516
  6. Step 6: Final answer
    x = 629,038.98

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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.