Home / 1,289.04-1,933.60-315.14

Finding the Fourth Proportional to 1,289.04, 1,933.60 and 315.14

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Solution

The fourth proportional to 1,289.04, 1,933.60 and 315.14 is: 472.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.04 : 1,933.60 = 315.14 : x
  2. Step 2: Convert to fraction form
    1,289.04/1,933.60 = 315.14/x
  3. Step 3: Cross multiply
    1,289.04x = 1,933.60 × 315.14
  4. Step 4: Simplify right side
    1,289.04x = 609,354.83
  5. Step 5: Solve for x
    x = 609,354.83/1,289.04
  6. Step 6: Final answer
    x = 472.72

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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.