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Finding the Fourth Proportional to 255,288.60, 382,988.16 and 77,790.96

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Solution

The fourth proportional to 255,288.60, 382,988.16 and 77,790.96 is: 116,703.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,288.60 : 382,988.16 = 77,790.96 : x
  2. Step 2: Convert to fraction form
    255,288.60/382,988.16 = 77,790.96/x
  3. Step 3: Cross multiply
    255,288.60x = 382,988.16 × 77,790.96
  4. Step 4: Simplify right side
    255,288.60x = 29,793,016,635.03
  5. Step 5: Solve for x
    x = 29,793,016,635.03/255,288.60
  6. Step 6: Final answer
    x = 116,703.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.