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Finding the Fourth Proportional to 486,081.40, 727,955.70 and 236,471.80

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Solution

The fourth proportional to 486,081.40, 727,955.70 and 236,471.80 is: 354,140.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,081.40 : 727,955.70 = 236,471.80 : x
  2. Step 2: Convert to fraction form
    486,081.40/727,955.70 = 236,471.80/x
  3. Step 3: Cross multiply
    486,081.40x = 727,955.70 × 236,471.80
  4. Step 4: Simplify right side
    486,081.40x = 172,140,994,699.26
  5. Step 5: Solve for x
    x = 172,140,994,699.26/486,081.40
  6. Step 6: Final answer
    x = 354,140.26

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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.