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Finding the Fourth Proportional to 521.01, 776.73 and 479.90

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Solution

The fourth proportional to 521.01, 776.73 and 479.90 is: 715.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.01 : 776.73 = 479.90 : x
  2. Step 2: Convert to fraction form
    521.01/776.73 = 479.90/x
  3. Step 3: Cross multiply
    521.01x = 776.73 × 479.90
  4. Step 4: Simplify right side
    521.01x = 372,756.47
  5. Step 5: Solve for x
    x = 372,756.47/521.01
  6. Step 6: Final answer
    x = 715.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.