Home / 1,346.15-2,019.45-421.52

Finding the Fourth Proportional to 1,346.15, 2,019.45 and 421.52

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Solution

The fourth proportional to 1,346.15, 2,019.45 and 421.52 is: 632.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,346.15 : 2,019.45 = 421.52 : x
  2. Step 2: Convert to fraction form
    1,346.15/2,019.45 = 421.52/x
  3. Step 3: Cross multiply
    1,346.15x = 2,019.45 × 421.52
  4. Step 4: Simplify right side
    1,346.15x = 851,243.61
  5. Step 5: Solve for x
    x = 851,243.61/1,346.15
  6. Step 6: Final answer
    x = 632.35

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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.