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Finding the Fourth Proportional to 653.49, 901.80 and 358.75

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Solution

The fourth proportional to 653.49, 901.80 and 358.75 is: 495.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.49 : 901.80 = 358.75 : x
  2. Step 2: Convert to fraction form
    653.49/901.80 = 358.75/x
  3. Step 3: Cross multiply
    653.49x = 901.80 × 358.75
  4. Step 4: Simplify right side
    653.49x = 323,520.75
  5. Step 5: Solve for x
    x = 323,520.75/653.49
  6. Step 6: Final answer
    x = 495.07

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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.