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Finding the Fourth Proportional to 571,295.68, 788,639.18 and 399,886.83

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Solution

The fourth proportional to 571,295.68, 788,639.18 and 399,886.83 is: 552,019.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,295.68 : 788,639.18 = 399,886.83 : x
  2. Step 2: Convert to fraction form
    571,295.68/788,639.18 = 399,886.83/x
  3. Step 3: Cross multiply
    571,295.68x = 788,639.18 × 399,886.83
  4. Step 4: Simplify right side
    571,295.68x = 315,366,419,704.57
  5. Step 5: Solve for x
    x = 315,366,419,704.57/571,295.68
  6. Step 6: Final answer
    x = 552,019.61

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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.