Home / 1,124.20-1,686.39-302.50

Finding the Fourth Proportional to 1,124.20, 1,686.39 and 302.50

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Solution

The fourth proportional to 1,124.20, 1,686.39 and 302.50 is: 453.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.20 : 1,686.39 = 302.50 : x
  2. Step 2: Convert to fraction form
    1,124.20/1,686.39 = 302.50/x
  3. Step 3: Cross multiply
    1,124.20x = 1,686.39 × 302.50
  4. Step 4: Simplify right side
    1,124.20x = 510,132.98
  5. Step 5: Solve for x
    x = 510,132.98/1,124.20
  6. Step 6: Final answer
    x = 453.77

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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.