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Finding the Fourth Proportional to 518,810.20, 776,465.70 and 455,824.60

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Solution

The fourth proportional to 518,810.20, 776,465.70 and 455,824.60 is: 682,199.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,810.20 : 776,465.70 = 455,824.60 : x
  2. Step 2: Convert to fraction form
    518,810.20/776,465.70 = 455,824.60/x
  3. Step 3: Cross multiply
    518,810.20x = 776,465.70 × 455,824.60
  4. Step 4: Simplify right side
    518,810.20x = 353,932,167,116.22
  5. Step 5: Solve for x
    x = 353,932,167,116.22/518,810.20
  6. Step 6: Final answer
    x = 682,199.71

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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.