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Finding the Fourth Proportional to 256,847.80, 385,271.70 and 163,766.20

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Solution

The fourth proportional to 256,847.80, 385,271.70 and 163,766.20 is: 245,649.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,847.80 : 385,271.70 = 163,766.20 : x
  2. Step 2: Convert to fraction form
    256,847.80/385,271.70 = 163,766.20/x
  3. Step 3: Cross multiply
    256,847.80x = 385,271.70 × 163,766.20
  4. Step 4: Simplify right side
    256,847.80x = 63,094,482,276.54
  5. Step 5: Solve for x
    x = 63,094,482,276.54/256,847.80
  6. Step 6: Final answer
    x = 245,649.30

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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.