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Finding the Fourth Proportional to 1,137.19, 1,705.81 and 357.18

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Solution

The fourth proportional to 1,137.19, 1,705.81 and 357.18 is: 535.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,137.19 : 1,705.81 = 357.18 : x
  2. Step 2: Convert to fraction form
    1,137.19/1,705.81 = 357.18/x
  3. Step 3: Cross multiply
    1,137.19x = 1,705.81 × 357.18
  4. Step 4: Simplify right side
    1,137.19x = 609,271.79
  5. Step 5: Solve for x
    x = 609,271.79/1,137.19
  6. Step 6: Final answer
    x = 535.77

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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.