Home / 281,439.10-388,385.31-154,113.58

Finding the Fourth Proportional to 281,439.10, 388,385.31 and 154,113.58

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Solution

The fourth proportional to 281,439.10, 388,385.31 and 154,113.58 is: 212,676.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,439.10 : 388,385.31 = 154,113.58 : x
  2. Step 2: Convert to fraction form
    281,439.10/388,385.31 = 154,113.58/x
  3. Step 3: Cross multiply
    281,439.10x = 388,385.31 × 154,113.58
  4. Step 4: Simplify right side
    281,439.10x = 59,855,450,543.51
  5. Step 5: Solve for x
    x = 59,855,450,543.51/281,439.10
  6. Step 6: Final answer
    x = 212,676.39

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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.