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Finding the Fourth Proportional to 1,556.48, 2,148.02 and 875.18

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Solution

The fourth proportional to 1,556.48, 2,148.02 and 875.18 is: 1,207.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,556.48 : 2,148.02 = 875.18 : x
  2. Step 2: Convert to fraction form
    1,556.48/2,148.02 = 875.18/x
  3. Step 3: Cross multiply
    1,556.48x = 2,148.02 × 875.18
  4. Step 4: Simplify right side
    1,556.48x = 1,879,904.14
  5. Step 5: Solve for x
    x = 1,879,904.14/1,556.48
  6. Step 6: Final answer
    x = 1,207.79

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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.