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Finding the Fourth Proportional to 653.53, 902.34 and 457.30

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Solution

The fourth proportional to 653.53, 902.34 and 457.30 is: 631.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.53 : 902.34 = 457.30 : x
  2. Step 2: Convert to fraction form
    653.53/902.34 = 457.30/x
  3. Step 3: Cross multiply
    653.53x = 902.34 × 457.30
  4. Step 4: Simplify right side
    653.53x = 412,640.08
  5. Step 5: Solve for x
    x = 412,640.08/653.53
  6. Step 6: Final answer
    x = 631.40

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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.