Home / 1,385.32-1,909.62-1,136.20

Finding the Fourth Proportional to 1,385.32, 1,909.62 and 1,136.20

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Solution

The fourth proportional to 1,385.32, 1,909.62 and 1,136.20 is: 1,566.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.32 : 1,909.62 = 1,136.20 : x
  2. Step 2: Convert to fraction form
    1,385.32/1,909.62 = 1,136.20/x
  3. Step 3: Cross multiply
    1,385.32x = 1,909.62 × 1,136.20
  4. Step 4: Simplify right side
    1,385.32x = 2,169,710.24
  5. Step 5: Solve for x
    x = 2,169,710.24/1,385.32
  6. Step 6: Final answer
    x = 1,566.22

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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.