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Finding the Fourth Proportional to 465.10, 697.65 and 457.90

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Solution

The fourth proportional to 465.10, 697.65 and 457.90 is: 686.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.10 : 697.65 = 457.90 : x
  2. Step 2: Convert to fraction form
    465.10/697.65 = 457.90/x
  3. Step 3: Cross multiply
    465.10x = 697.65 × 457.90
  4. Step 4: Simplify right side
    465.10x = 319,453.94
  5. Step 5: Solve for x
    x = 319,453.94/465.10
  6. Step 6: Final answer
    x = 686.85

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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.