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Finding the Fourth Proportional to 720,862.82, 994,779.75 and 394,176.88

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Solution

The fourth proportional to 720,862.82, 994,779.75 and 394,176.88 is: 543,958.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,862.82 : 994,779.75 = 394,176.88 : x
  2. Step 2: Convert to fraction form
    720,862.82/994,779.75 = 394,176.88/x
  3. Step 3: Cross multiply
    720,862.82x = 994,779.75 × 394,176.88
  4. Step 4: Simplify right side
    720,862.82x = 392,119,173,050.94
  5. Step 5: Solve for x
    x = 392,119,173,050.94/720,862.82
  6. Step 6: Final answer
    x = 543,958.10

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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.