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Finding the Fourth Proportional to 256,742.40, 385,113.60 and 116,774.40

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Solution

The fourth proportional to 256,742.40, 385,113.60 and 116,774.40 is: 175,161.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,742.40 : 385,113.60 = 116,774.40 : x
  2. Step 2: Convert to fraction form
    256,742.40/385,113.60 = 116,774.40/x
  3. Step 3: Cross multiply
    256,742.40x = 385,113.60 × 116,774.40
  4. Step 4: Simplify right side
    256,742.40x = 44,971,409,571.84
  5. Step 5: Solve for x
    x = 44,971,409,571.84/256,742.40
  6. Step 6: Final answer
    x = 175,161.60

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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.