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Finding the Fourth Proportional to 1,136.64, 1,703.76 and 807.60

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Solution

The fourth proportional to 1,136.64, 1,703.76 and 807.60 is: 1,210.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.64 : 1,703.76 = 807.60 : x
  2. Step 2: Convert to fraction form
    1,136.64/1,703.76 = 807.60/x
  3. Step 3: Cross multiply
    1,136.64x = 1,703.76 × 807.60
  4. Step 4: Simplify right side
    1,136.64x = 1,375,956.58
  5. Step 5: Solve for x
    x = 1,375,956.58/1,136.64
  6. Step 6: Final answer
    x = 1,210.55

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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.