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Finding the Fourth Proportional to 281,197.80, 388,047.78 and 153,870.84

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Solution

The fourth proportional to 281,197.80, 388,047.78 and 153,870.84 is: 212,338.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,197.80 : 388,047.78 = 153,870.84 : x
  2. Step 2: Convert to fraction form
    281,197.80/388,047.78 = 153,870.84/x
  3. Step 3: Cross multiply
    281,197.80x = 388,047.78 × 153,870.84
  4. Step 4: Simplify right side
    281,197.80x = 59,709,237,868.74
  5. Step 5: Solve for x
    x = 59,709,237,868.74/281,197.80
  6. Step 6: Final answer
    x = 212,338.92

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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.