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Finding the Fourth Proportional to 848.68, 1,170 and 725.65

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Solution

The fourth proportional to 848.68, 1,170 and 725.65 is: 1,000.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    848.68 : 1,170 = 725.65 : x
  2. Step 2: Convert to fraction form
    848.68/1,170 = 725.65/x
  3. Step 3: Cross multiply
    848.68x = 1,170 × 725.65
  4. Step 4: Simplify right side
    848.68x = 849,007.58
  5. Step 5: Solve for x
    x = 849,007.58/848.68
  6. Step 6: Final answer
    x = 1,000.39

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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.