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Finding the Fourth Proportional to 477.85, 715.55 and 404.95

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Solution

The fourth proportional to 477.85, 715.55 and 404.95 is: 606.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    477.85 : 715.55 = 404.95 : x
  2. Step 2: Convert to fraction form
    477.85/715.55 = 404.95/x
  3. Step 3: Cross multiply
    477.85x = 715.55 × 404.95
  4. Step 4: Simplify right side
    477.85x = 289,758.39
  5. Step 5: Solve for x
    x = 289,758.39/477.85
  6. Step 6: Final answer
    x = 606.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.