Home / 281,450.30-388,389.75-154,123.70

Finding the Fourth Proportional to 281,450.30, 388,389.75 and 154,123.70

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Solution

The fourth proportional to 281,450.30, 388,389.75 and 154,123.70 is: 212,684.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,450.30 : 388,389.75 = 154,123.70 : x
  2. Step 2: Convert to fraction form
    281,450.30/388,389.75 = 154,123.70/x
  3. Step 3: Cross multiply
    281,450.30x = 388,389.75 × 154,123.70
  4. Step 4: Simplify right side
    281,450.30x = 59,860,065,312.08
  5. Step 5: Solve for x
    x = 59,860,065,312.08/281,450.30
  6. Step 6: Final answer
    x = 212,684.32

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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.