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Finding the Fourth Proportional to 484.77, 727.50 and 430.40

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Solution

The fourth proportional to 484.77, 727.50 and 430.40 is: 645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.77 : 727.50 = 430.40 : x
  2. Step 2: Convert to fraction form
    484.77/727.50 = 430.40/x
  3. Step 3: Cross multiply
    484.77x = 727.50 × 430.40
  4. Step 4: Simplify right side
    484.77x = 313,112.36
  5. Step 5: Solve for x
    x = 313,112.36/484.77
  6. Step 6: Final answer
    x = 645.90

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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.