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Finding the Fourth Proportional to 208,283.78, 287,431.77 and 112,790.58

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Solution

The fourth proportional to 208,283.78, 287,431.77 and 112,790.58 is: 155,651.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,283.78 : 287,431.77 = 112,790.58 : x
  2. Step 2: Convert to fraction form
    208,283.78/287,431.77 = 112,790.58/x
  3. Step 3: Cross multiply
    208,283.78x = 287,431.77 × 112,790.58
  4. Step 4: Simplify right side
    208,283.78x = 32,419,596,048.73
  5. Step 5: Solve for x
    x = 32,419,596,048.73/208,283.78
  6. Step 6: Final answer
    x = 155,651.08

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1.5x scale

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.