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Finding the Fourth Proportional to 1,136.77, 1,568.77 and 665.01

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Solution

The fourth proportional to 1,136.77, 1,568.77 and 665.01 is: 917.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.77 : 1,568.77 = 665.01 : x
  2. Step 2: Convert to fraction form
    1,136.77/1,568.77 = 665.01/x
  3. Step 3: Cross multiply
    1,136.77x = 1,568.77 × 665.01
  4. Step 4: Simplify right side
    1,136.77x = 1,043,246.08
  5. Step 5: Solve for x
    x = 1,043,246.08/1,136.77
  6. Step 6: Final answer
    x = 917.73

Related Problems

Find fourth proportional to 568.38, 784.38 and 332.51
Half scale
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Double scale
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Similar ratio
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1.5x scale

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.