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Finding the Fourth Proportional to 716,674.81, 988,986.45 and 394,354.77

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Solution

The fourth proportional to 716,674.81, 988,986.45 and 394,354.77 is: 544,195.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,674.81 : 988,986.45 = 394,354.77 : x
  2. Step 2: Convert to fraction form
    716,674.81/988,986.45 = 394,354.77/x
  3. Step 3: Cross multiply
    716,674.81x = 988,986.45 × 394,354.77
  4. Step 4: Simplify right side
    716,674.81x = 390,011,522,051.09
  5. Step 5: Solve for x
    x = 390,011,522,051.09/716,674.81
  6. Step 6: Final answer
    x = 544,195.94

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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.