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Finding the Fourth Proportional to 559.99, 840.03 and 318.07

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Solution

The fourth proportional to 559.99, 840.03 and 318.07 is: 477.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.99 : 840.03 = 318.07 : x
  2. Step 2: Convert to fraction form
    559.99/840.03 = 318.07/x
  3. Step 3: Cross multiply
    559.99x = 840.03 × 318.07
  4. Step 4: Simplify right side
    559.99x = 267,188.34
  5. Step 5: Solve for x
    x = 267,188.34/559.99
  6. Step 6: Final answer
    x = 477.13

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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.