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Finding the Fourth Proportional to 281,312.64, 388,215.72 and 154,000.08

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Solution

The fourth proportional to 281,312.64, 388,215.72 and 154,000.08 is: 212,522.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,312.64 : 388,215.72 = 154,000.08 : x
  2. Step 2: Convert to fraction form
    281,312.64/388,215.72 = 154,000.08/x
  3. Step 3: Cross multiply
    281,312.64x = 388,215.72 × 154,000.08
  4. Step 4: Simplify right side
    281,312.64x = 59,785,251,937.26
  5. Step 5: Solve for x
    x = 59,785,251,937.26/281,312.64
  6. Step 6: Final answer
    x = 212,522.45

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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.