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Finding the Fourth Proportional to 256,998.40, 385,497.60 and 70,009.60

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Solution

The fourth proportional to 256,998.40, 385,497.60 and 70,009.60 is: 105,014.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,998.40 : 385,497.60 = 70,009.60 : x
  2. Step 2: Convert to fraction form
    256,998.40/385,497.60 = 70,009.60/x
  3. Step 3: Cross multiply
    256,998.40x = 385,497.60 × 70,009.60
  4. Step 4: Simplify right side
    256,998.40x = 26,988,532,776.96
  5. Step 5: Solve for x
    x = 26,988,532,776.96/256,998.40
  6. Step 6: Final answer
    x = 105,014.40

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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.