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Finding the Fourth Proportional to 487, 734.15 and 479.71

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Solution

The fourth proportional to 487, 734.15 and 479.71 is: 723.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    487 : 734.15 = 479.71 : x
  2. Step 2: Convert to fraction form
    487/734.15 = 479.71/x
  3. Step 3: Cross multiply
    487x = 734.15 × 479.71
  4. Step 4: Simplify right side
    487x = 352,179.10
  5. Step 5: Solve for x
    x = 352,179.10/487
  6. Step 6: Final answer
    x = 723.16

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.