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Finding the Fourth Proportional to 281,455.68, 388,409.88 and 154,130.16

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Solution

The fourth proportional to 281,455.68, 388,409.88 and 154,130.16 is: 212,700.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,455.68 : 388,409.88 = 154,130.16 : x
  2. Step 2: Convert to fraction form
    281,455.68/388,409.88 = 154,130.16/x
  3. Step 3: Cross multiply
    281,455.68x = 388,409.88 × 154,130.16
  4. Step 4: Simplify right side
    281,455.68x = 59,865,676,949.98
  5. Step 5: Solve for x
    x = 59,865,676,949.98/281,455.68
  6. Step 6: Final answer
    x = 212,700.19

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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.