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Finding the Fourth Proportional to 1,152.68, 1,590.80 and 655.38

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Solution

The fourth proportional to 1,152.68, 1,590.80 and 655.38 is: 904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.68 : 1,590.80 = 655.38 : x
  2. Step 2: Convert to fraction form
    1,152.68/1,590.80 = 655.38/x
  3. Step 3: Cross multiply
    1,152.68x = 1,590.80 × 655.38
  4. Step 4: Simplify right side
    1,152.68x = 1,042,575.23
  5. Step 5: Solve for x
    x = 1,042,575.23/1,152.68
  6. Step 6: Final answer
    x = 904.48

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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.