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Finding the Fourth Proportional to 279,489.64, 385,695.12 and 152,164.12

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Solution

The fourth proportional to 279,489.64, 385,695.12 and 152,164.12 is: 209,986.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,489.64 : 385,695.12 = 152,164.12 : x
  2. Step 2: Convert to fraction form
    279,489.64/385,695.12 = 152,164.12/x
  3. Step 3: Cross multiply
    279,489.64x = 385,695.12 × 152,164.12
  4. Step 4: Simplify right side
    279,489.64x = 58,688,958,523.09
  5. Step 5: Solve for x
    x = 58,688,958,523.09/279,489.64
  6. Step 6: Final answer
    x = 209,986.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.