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Finding the Fourth Proportional to 281,392.38, 388,358.55 and 160,505.82

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Solution

The fourth proportional to 281,392.38, 388,358.55 and 160,505.82 is: 221,519.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,392.38 : 388,358.55 = 160,505.82 : x
  2. Step 2: Convert to fraction form
    281,392.38/388,358.55 = 160,505.82/x
  3. Step 3: Cross multiply
    281,392.38x = 388,358.55 × 160,505.82
  4. Step 4: Simplify right side
    281,392.38x = 62,333,807,521.76
  5. Step 5: Solve for x
    x = 62,333,807,521.76/281,392.38
  6. Step 6: Final answer
    x = 221,519.17

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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.