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Finding the Fourth Proportional to 653.69, 901.87 and 404.75

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Solution

The fourth proportional to 653.69, 901.87 and 404.75 is: 558.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    653.69 : 901.87 = 404.75 : x
  2. Step 2: Convert to fraction form
    653.69/901.87 = 404.75/x
  3. Step 3: Cross multiply
    653.69x = 901.87 × 404.75
  4. Step 4: Simplify right side
    653.69x = 365,031.88
  5. Step 5: Solve for x
    x = 365,031.88/653.69
  6. Step 6: Final answer
    x = 558.42

Related Problems

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Double scale
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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.