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Finding the Fourth Proportional to 1,345.44, 1,855.80 and 848.70

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Solution

The fourth proportional to 1,345.44, 1,855.80 and 848.70 is: 1,170.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,345.44 : 1,855.80 = 848.70 : x
  2. Step 2: Convert to fraction form
    1,345.44/1,855.80 = 848.70/x
  3. Step 3: Cross multiply
    1,345.44x = 1,855.80 × 848.70
  4. Step 4: Simplify right side
    1,345.44x = 1,575,017.46
  5. Step 5: Solve for x
    x = 1,575,017.46/1,345.44
  6. Step 6: Final answer
    x = 1,170.63

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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.