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Finding the Fourth Proportional to 620,326.18, 856,375.23 and 417,443.86

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Solution

The fourth proportional to 620,326.18, 856,375.23 and 417,443.86 is: 576,291.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,326.18 : 856,375.23 = 417,443.86 : x
  2. Step 2: Convert to fraction form
    620,326.18/856,375.23 = 417,443.86/x
  3. Step 3: Cross multiply
    620,326.18x = 856,375.23 × 417,443.86
  4. Step 4: Simplify right side
    620,326.18x = 357,488,581,619.59
  5. Step 5: Solve for x
    x = 357,488,581,619.59/620,326.18
  6. Step 6: Final answer
    x = 576,291.30

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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.