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Finding the Fourth Proportional to 559.69, 839.63 and 457.90

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Solution

The fourth proportional to 559.69, 839.63 and 457.90 is: 686.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.69 : 839.63 = 457.90 : x
  2. Step 2: Convert to fraction form
    559.69/839.63 = 457.90/x
  3. Step 3: Cross multiply
    559.69x = 839.63 × 457.90
  4. Step 4: Simplify right side
    559.69x = 384,466.58
  5. Step 5: Solve for x
    x = 384,466.58/559.69
  6. Step 6: Final answer
    x = 686.93

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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.