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Finding the Fourth Proportional to 953.16, 1,315.80 and 673.62

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Solution

The fourth proportional to 953.16, 1,315.80 and 673.62 is: 929.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    953.16 : 1,315.80 = 673.62 : x
  2. Step 2: Convert to fraction form
    953.16/1,315.80 = 673.62/x
  3. Step 3: Cross multiply
    953.16x = 1,315.80 × 673.62
  4. Step 4: Simplify right side
    953.16x = 886,349.20
  5. Step 5: Solve for x
    x = 886,349.20/953.16
  6. Step 6: Final answer
    x = 929.91

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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.