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Finding the Fourth Proportional to 620,352.18, 856,411.20 and 417,469.86

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Solution

The fourth proportional to 620,352.18, 856,411.20 and 417,469.86 is: 576,327.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,352.18 : 856,411.20 = 417,469.86 : x
  2. Step 2: Convert to fraction form
    620,352.18/856,411.20 = 417,469.86/x
  3. Step 3: Cross multiply
    620,352.18x = 856,411.20 × 417,469.86
  4. Step 4: Simplify right side
    620,352.18x = 357,525,863,766.43
  5. Step 5: Solve for x
    x = 357,525,863,766.43/620,352.18
  6. Step 6: Final answer
    x = 576,327.25

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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.