Home / 1,125.06-1,688.40-475.80

Finding the Fourth Proportional to 1,125.06, 1,688.40 and 475.80

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Solution

The fourth proportional to 1,125.06, 1,688.40 and 475.80 is: 714.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,125.06 : 1,688.40 = 475.80 : x
  2. Step 2: Convert to fraction form
    1,125.06/1,688.40 = 475.80/x
  3. Step 3: Cross multiply
    1,125.06x = 1,688.40 × 475.80
  4. Step 4: Simplify right side
    1,125.06x = 803,340.72
  5. Step 5: Solve for x
    x = 803,340.72/1,125.06
  6. Step 6: Final answer
    x = 714.04

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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.