Home / 1,108.30-1,529.55-666.19

Finding the Fourth Proportional to 1,108.30, 1,529.55 and 666.19

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Solution

The fourth proportional to 1,108.30, 1,529.55 and 666.19 is: 919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,108.30 : 1,529.55 = 666.19 : x
  2. Step 2: Convert to fraction form
    1,108.30/1,529.55 = 666.19/x
  3. Step 3: Cross multiply
    1,108.30x = 1,529.55 × 666.19
  4. Step 4: Simplify right side
    1,108.30x = 1,018,963.27
  5. Step 5: Solve for x
    x = 1,018,963.27/1,108.30
  6. Step 6: Final answer
    x = 919.40

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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.