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Finding the Fourth Proportional to 353,015.34, 487,158.90 and 202,141.50

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Solution

The fourth proportional to 353,015.34, 487,158.90 and 202,141.50 is: 278,953.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,015.34 : 487,158.90 = 202,141.50 : x
  2. Step 2: Convert to fraction form
    353,015.34/487,158.90 = 202,141.50/x
  3. Step 3: Cross multiply
    353,015.34x = 487,158.90 × 202,141.50
  4. Step 4: Simplify right side
    353,015.34x = 98,475,030,784.35
  5. Step 5: Solve for x
    x = 98,475,030,784.35/353,015.34
  6. Step 6: Final answer
    x = 278,953.97

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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.