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Finding the Fourth Proportional to 468.40, 705.75 and 389.02

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Solution

The fourth proportional to 468.40, 705.75 and 389.02 is: 586.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    468.40 : 705.75 = 389.02 : x
  2. Step 2: Convert to fraction form
    468.40/705.75 = 389.02/x
  3. Step 3: Cross multiply
    468.40x = 705.75 × 389.02
  4. Step 4: Simplify right side
    468.40x = 274,550.87
  5. Step 5: Solve for x
    x = 274,550.87/468.40
  6. Step 6: Final answer
    x = 586.15

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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.