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Finding the Fourth Proportional to 1,136.02, 1,567.79 and 664.06

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Solution

The fourth proportional to 1,136.02, 1,567.79 and 664.06 is: 916.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,136.02 : 1,567.79 = 664.06 : x
  2. Step 2: Convert to fraction form
    1,136.02/1,567.79 = 664.06/x
  3. Step 3: Cross multiply
    1,136.02x = 1,567.79 × 664.06
  4. Step 4: Simplify right side
    1,136.02x = 1,041,106.63
  5. Step 5: Solve for x
    x = 1,041,106.63/1,136.02
  6. Step 6: Final answer
    x = 916.45

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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.