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Finding the Fourth Proportional to 899.22, 1,240.98 and 545.39

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Solution

The fourth proportional to 899.22, 1,240.98 and 545.39 is: 752.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.22 : 1,240.98 = 545.39 : x
  2. Step 2: Convert to fraction form
    899.22/1,240.98 = 545.39/x
  3. Step 3: Cross multiply
    899.22x = 1,240.98 × 545.39
  4. Step 4: Simplify right side
    899.22x = 676,818.08
  5. Step 5: Solve for x
    x = 676,818.08/899.22
  6. Step 6: Final answer
    x = 752.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.