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Finding the Fourth Proportional to 1,037.34, 1,556.55 and 421.50

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Solution

The fourth proportional to 1,037.34, 1,556.55 and 421.50 is: 632.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.34 : 1,556.55 = 421.50 : x
  2. Step 2: Convert to fraction form
    1,037.34/1,556.55 = 421.50/x
  3. Step 3: Cross multiply
    1,037.34x = 1,556.55 × 421.50
  4. Step 4: Simplify right side
    1,037.34x = 656,091.66
  5. Step 5: Solve for x
    x = 656,091.66/1,037.34
  6. Step 6: Final answer
    x = 632.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.