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Finding the Fourth Proportional to 903.92, 1,247.42 and 530.92

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Solution

The fourth proportional to 903.92, 1,247.42 and 530.92 is: 732.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.92 : 1,247.42 = 530.92 : x
  2. Step 2: Convert to fraction form
    903.92/1,247.42 = 530.92/x
  3. Step 3: Cross multiply
    903.92x = 1,247.42 × 530.92
  4. Step 4: Simplify right side
    903.92x = 662,271.33
  5. Step 5: Solve for x
    x = 662,271.33/903.92
  6. Step 6: Final answer
    x = 732.67

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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.