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Finding the Fourth Proportional to 286,784.20, 395,766.72 and 157,728.28

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Solution

The fourth proportional to 286,784.20, 395,766.72 and 157,728.28 is: 217,667.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,784.20 : 395,766.72 = 157,728.28 : x
  2. Step 2: Convert to fraction form
    286,784.20/395,766.72 = 157,728.28/x
  3. Step 3: Cross multiply
    286,784.20x = 395,766.72 × 157,728.28
  4. Step 4: Simplify right side
    286,784.20x = 62,423,604,026.84
  5. Step 5: Solve for x
    x = 62,423,604,026.84/286,784.20
  6. Step 6: Final answer
    x = 217,667.51

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.