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Finding the Fourth Proportional to 614.40, 842.40 and 604.80

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Solution

The fourth proportional to 614.40, 842.40 and 604.80 is: 829.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.40 : 842.40 = 604.80 : x
  2. Step 2: Convert to fraction form
    614.40/842.40 = 604.80/x
  3. Step 3: Cross multiply
    614.40x = 842.40 × 604.80
  4. Step 4: Simplify right side
    614.40x = 509,483.52
  5. Step 5: Solve for x
    x = 509,483.52/614.40
  6. Step 6: Final answer
    x = 829.24

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.