Home / 1,124.15-1,686.32-302.40

Finding the Fourth Proportional to 1,124.15, 1,686.32 and 302.40

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Solution

The fourth proportional to 1,124.15, 1,686.32 and 302.40 is: 453.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,124.15 : 1,686.32 = 302.40 : x
  2. Step 2: Convert to fraction form
    1,124.15/1,686.32 = 302.40/x
  3. Step 3: Cross multiply
    1,124.15x = 1,686.32 × 302.40
  4. Step 4: Simplify right side
    1,124.15x = 509,947.38
  5. Step 5: Solve for x
    x = 509,947.38/1,124.15
  6. Step 6: Final answer
    x = 453.63

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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.