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Finding the Fourth Proportional to 1,136.09, 1,567.96 and 664.00

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Solution

The fourth proportional to 1,136.09, 1,567.96 and 664.00 is: 916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.09 : 1,567.96 = 664.00 : x
  2. Step 2: Convert to fraction form
    1,136.09/1,567.96 = 664.00/x
  3. Step 3: Cross multiply
    1,136.09x = 1,567.96 × 664.00
  4. Step 4: Simplify right side
    1,136.09x = 1,041,119.86
  5. Step 5: Solve for x
    x = 1,041,119.86/1,136.09
  6. Step 6: Final answer
    x = 916.40

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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.