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Finding the Fourth Proportional to 1,153.02, 1,590.90 and 655.54

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Solution

The fourth proportional to 1,153.02, 1,590.90 and 655.54 is: 904.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.02 : 1,590.90 = 655.54 : x
  2. Step 2: Convert to fraction form
    1,153.02/1,590.90 = 655.54/x
  3. Step 3: Cross multiply
    1,153.02x = 1,590.90 × 655.54
  4. Step 4: Simplify right side
    1,153.02x = 1,042,898.59
  5. Step 5: Solve for x
    x = 1,042,898.59/1,153.02
  6. Step 6: Final answer
    x = 904.49

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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.