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Finding the Fourth Proportional to 281,695.64, 388,743.04 and 154,368.50

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Solution

The fourth proportional to 281,695.64, 388,743.04 and 154,368.50 is: 213,030.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,695.64 : 388,743.04 = 154,368.50 : x
  2. Step 2: Convert to fraction form
    281,695.64/388,743.04 = 154,368.50/x
  3. Step 3: Cross multiply
    281,695.64x = 388,743.04 × 154,368.50
  4. Step 4: Simplify right side
    281,695.64x = 60,009,679,970.24
  5. Step 5: Solve for x
    x = 60,009,679,970.24/281,695.64
  6. Step 6: Final answer
    x = 213,030.21

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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.