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Finding the Fourth Proportional to 716,646.07, 988,950.63 and 394,355.98

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Solution

The fourth proportional to 716,646.07, 988,950.63 and 394,355.98 is: 544,199.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,646.07 : 988,950.63 = 394,355.98 : x
  2. Step 2: Convert to fraction form
    716,646.07/988,950.63 = 394,355.98/x
  3. Step 3: Cross multiply
    716,646.07x = 988,950.63 × 394,355.98
  4. Step 4: Simplify right side
    716,646.07x = 389,998,594,865.27
  5. Step 5: Solve for x
    x = 389,998,594,865.27/716,646.07
  6. Step 6: Final answer
    x = 544,199.73

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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.