Home / 1,037.60-1,556.47-421.30

Finding the Fourth Proportional to 1,037.60, 1,556.47 and 421.30

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Solution

The fourth proportional to 1,037.60, 1,556.47 and 421.30 is: 631.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,037.60 : 1,556.47 = 421.30 : x
  2. Step 2: Convert to fraction form
    1,037.60/1,556.47 = 421.30/x
  3. Step 3: Cross multiply
    1,037.60x = 1,556.47 × 421.30
  4. Step 4: Simplify right side
    1,037.60x = 655,740.81
  5. Step 5: Solve for x
    x = 655,740.81/1,037.60
  6. Step 6: Final answer
    x = 631.98

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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.