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Finding the Fourth Proportional to 486,005.40, 728,489.70 and 186,370.20

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Solution

The fourth proportional to 486,005.40, 728,489.70 and 186,370.20 is: 279,356.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,005.40 : 728,489.70 = 186,370.20 : x
  2. Step 2: Convert to fraction form
    486,005.40/728,489.70 = 186,370.20/x
  3. Step 3: Cross multiply
    486,005.40x = 728,489.70 × 186,370.20
  4. Step 4: Simplify right side
    486,005.40x = 135,768,771,086.94
  5. Step 5: Solve for x
    x = 135,768,771,086.94/486,005.40
  6. Step 6: Final answer
    x = 279,356.51

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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.