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Finding the Fourth Proportional to 351,925.25, 485,119.41 and 215,706.74

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Solution

The fourth proportional to 351,925.25, 485,119.41 and 215,706.74 is: 297,345.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,925.25 : 485,119.41 = 215,706.74 : x
  2. Step 2: Convert to fraction form
    351,925.25/485,119.41 = 215,706.74/x
  3. Step 3: Cross multiply
    351,925.25x = 485,119.41 × 215,706.74
  4. Step 4: Simplify right side
    351,925.25x = 104,643,526,441.82
  5. Step 5: Solve for x
    x = 104,643,526,441.82/351,925.25
  6. Step 6: Final answer
    x = 297,345.89

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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.