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Finding the Fourth Proportional to 256,742.80, 385,179.08 and 207,272.40

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Solution

The fourth proportional to 256,742.80, 385,179.08 and 207,272.40 is: 310,960.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,742.80 : 385,179.08 = 207,272.40 : x
  2. Step 2: Convert to fraction form
    256,742.80/385,179.08 = 207,272.40/x
  3. Step 3: Cross multiply
    256,742.80x = 385,179.08 × 207,272.40
  4. Step 4: Simplify right side
    256,742.80x = 79,836,992,341.39
  5. Step 5: Solve for x
    x = 79,836,992,341.39/256,742.80
  6. Step 6: Final answer
    x = 310,960.98

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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.