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Finding the Fourth Proportional to 281,920.79, 388,674.28 and 223,969.78

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Solution

The fourth proportional to 281,920.79, 388,674.28 and 223,969.78 is: 308,779.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,920.79 : 388,674.28 = 223,969.78 : x
  2. Step 2: Convert to fraction form
    281,920.79/388,674.28 = 223,969.78/x
  3. Step 3: Cross multiply
    281,920.79x = 388,674.28 × 223,969.78
  4. Step 4: Simplify right side
    281,920.79x = 87,051,292,983.26
  5. Step 5: Solve for x
    x = 87,051,292,983.26/281,920.79
  6. Step 6: Final answer
    x = 308,779.26

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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.