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Finding the Fourth Proportional to 281,396.68, 388,328.52 and 154,071.16

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Solution

The fourth proportional to 281,396.68, 388,328.52 and 154,071.16 is: 212,618.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,396.68 : 388,328.52 = 154,071.16 : x
  2. Step 2: Convert to fraction form
    281,396.68/388,328.52 = 154,071.16/x
  3. Step 3: Cross multiply
    281,396.68x = 388,328.52 × 154,071.16
  4. Step 4: Simplify right side
    281,396.68x = 59,830,225,537.48
  5. Step 5: Solve for x
    x = 59,830,225,537.48/281,396.68
  6. Step 6: Final answer
    x = 212,618.80

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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.