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Finding the Fourth Proportional to 256,820.20, 385,230.30 and 162,341.80

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Solution

The fourth proportional to 256,820.20, 385,230.30 and 162,341.80 is: 243,512.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,820.20 : 385,230.30 = 162,341.80 : x
  2. Step 2: Convert to fraction form
    256,820.20/385,230.30 = 162,341.80/x
  3. Step 3: Cross multiply
    256,820.20x = 385,230.30 × 162,341.80
  4. Step 4: Simplify right side
    256,820.20x = 62,538,980,316.54
  5. Step 5: Solve for x
    x = 62,538,980,316.54/256,820.20
  6. Step 6: Final answer
    x = 243,512.70

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1.5x scale

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.