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Finding the Fourth Proportional to 281,810.88, 388,908 and 154,485.36

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Solution

The fourth proportional to 281,810.88, 388,908 and 154,485.36 is: 213,194.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,810.88 : 388,908 = 154,485.36 : x
  2. Step 2: Convert to fraction form
    281,810.88/388,908 = 154,485.36/x
  3. Step 3: Cross multiply
    281,810.88x = 388,908 × 154,485.36
  4. Step 4: Simplify right side
    281,810.88x = 60,080,592,386.88
  5. Step 5: Solve for x
    x = 60,080,592,386.88/281,810.88
  6. Step 6: Final answer
    x = 213,194.72

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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.