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Finding the Fourth Proportional to 653.79, 902.12 and 479.55

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Solution

The fourth proportional to 653.79, 902.12 and 479.55 is: 661.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.79 : 902.12 = 479.55 : x
  2. Step 2: Convert to fraction form
    653.79/902.12 = 479.55/x
  3. Step 3: Cross multiply
    653.79x = 902.12 × 479.55
  4. Step 4: Simplify right side
    653.79x = 432,609.25
  5. Step 5: Solve for x
    x = 432,609.25/653.79
  6. Step 6: Final answer
    x = 661.69

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1.5x scale

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.