Home / 1,187.55-1,779.08-1,031.72

Finding the Fourth Proportional to 1,187.55, 1,779.08 and 1,031.72

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Solution

The fourth proportional to 1,187.55, 1,779.08 and 1,031.72 is: 1,545.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187.55 : 1,779.08 = 1,031.72 : x
  2. Step 2: Convert to fraction form
    1,187.55/1,779.08 = 1,031.72/x
  3. Step 3: Cross multiply
    1,187.55x = 1,779.08 × 1,031.72
  4. Step 4: Simplify right side
    1,187.55x = 1,835,498.36
  5. Step 5: Solve for x
    x = 1,835,498.36/1,187.55
  6. Step 6: Final answer
    x = 1,545.62

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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.