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Finding the Fourth Proportional to 586,672.81, 809,608.80 and 318,400.81

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Solution

The fourth proportional to 586,672.81, 809,608.80 and 318,400.81 is: 439,393.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,672.81 : 809,608.80 = 318,400.81 : x
  2. Step 2: Convert to fraction form
    586,672.81/809,608.80 = 318,400.81/x
  3. Step 3: Cross multiply
    586,672.81x = 809,608.80 × 318,400.81
  4. Step 4: Simplify right side
    586,672.81x = 257,780,096,873.11
  5. Step 5: Solve for x
    x = 257,780,096,873.11/586,672.81
  6. Step 6: Final answer
    x = 439,393.29

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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.