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Finding the Fourth Proportional to 256,838.70, 385,695.45 and 168,483.90

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Solution

The fourth proportional to 256,838.70, 385,695.45 and 168,483.90 is: 253,012.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,838.70 : 385,695.45 = 168,483.90 : x
  2. Step 2: Convert to fraction form
    256,838.70/385,695.45 = 168,483.90/x
  3. Step 3: Cross multiply
    256,838.70x = 385,695.45 × 168,483.90
  4. Step 4: Simplify right side
    256,838.70x = 64,983,473,628.26
  5. Step 5: Solve for x
    x = 64,983,473,628.26/256,838.70
  6. Step 6: Final answer
    x = 253,012.78

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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.