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Finding the Fourth Proportional to 486,041.40, 728,843.40 and 186,422.40

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Solution

The fourth proportional to 486,041.40, 728,843.40 and 186,422.40 is: 279,549.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,041.40 : 728,843.40 = 186,422.40 : x
  2. Step 2: Convert to fraction form
    486,041.40/728,843.40 = 186,422.40/x
  3. Step 3: Cross multiply
    486,041.40x = 728,843.40 × 186,422.40
  4. Step 4: Simplify right side
    486,041.40x = 135,872,735,852.16
  5. Step 5: Solve for x
    x = 135,872,735,852.16/486,041.40
  6. Step 6: Final answer
    x = 279,549.72

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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.