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Finding the Fourth Proportional to 677,969.84, 935,452.22 and 391,323.86

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Solution

The fourth proportional to 677,969.84, 935,452.22 and 391,323.86 is: 539,942.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,969.84 : 935,452.22 = 391,323.86 : x
  2. Step 2: Convert to fraction form
    677,969.84/935,452.22 = 391,323.86/x
  3. Step 3: Cross multiply
    677,969.84x = 935,452.22 × 391,323.86
  4. Step 4: Simplify right side
    677,969.84x = 366,064,768,898.71
  5. Step 5: Solve for x
    x = 366,064,768,898.71/677,969.84
  6. Step 6: Final answer
    x = 539,942.56

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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.