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Finding the Fourth Proportional to 460.81, 689.51 and 415.33

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Solution

The fourth proportional to 460.81, 689.51 and 415.33 is: 621.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    460.81 : 689.51 = 415.33 : x
  2. Step 2: Convert to fraction form
    460.81/689.51 = 415.33/x
  3. Step 3: Cross multiply
    460.81x = 689.51 × 415.33
  4. Step 4: Simplify right side
    460.81x = 286,373.50
  5. Step 5: Solve for x
    x = 286,373.50/460.81
  6. Step 6: Final answer
    x = 621.45

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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.