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Finding the Fourth Proportional to 680,909.09, 939,442.86 and 386,509.73

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Solution

The fourth proportional to 680,909.09, 939,442.86 and 386,509.73 is: 533,263.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,909.09 : 939,442.86 = 386,509.73 : x
  2. Step 2: Convert to fraction form
    680,909.09/939,442.86 = 386,509.73/x
  3. Step 3: Cross multiply
    680,909.09x = 939,442.86 × 386,509.73
  4. Step 4: Simplify right side
    680,909.09x = 363,103,801,471.81
  5. Step 5: Solve for x
    x = 363,103,801,471.81/680,909.09
  6. Step 6: Final answer
    x = 533,263.26

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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.