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Finding the Fourth Proportional to 1,154.70, 1,731.02 and 505.08

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Solution

The fourth proportional to 1,154.70, 1,731.02 and 505.08 is: 757.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.70 : 1,731.02 = 505.08 : x
  2. Step 2: Convert to fraction form
    1,154.70/1,731.02 = 505.08/x
  3. Step 3: Cross multiply
    1,154.70x = 1,731.02 × 505.08
  4. Step 4: Simplify right side
    1,154.70x = 874,303.58
  5. Step 5: Solve for x
    x = 874,303.58/1,154.70
  6. Step 6: Final answer
    x = 757.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.