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Finding the Fourth Proportional to 478.90, 714.52 and 426.93

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Solution

The fourth proportional to 478.90, 714.52 and 426.93 is: 636.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.90 : 714.52 = 426.93 : x
  2. Step 2: Convert to fraction form
    478.90/714.52 = 426.93/x
  3. Step 3: Cross multiply
    478.90x = 714.52 × 426.93
  4. Step 4: Simplify right side
    478.90x = 305,050.02
  5. Step 5: Solve for x
    x = 305,050.02/478.90
  6. Step 6: Final answer
    x = 636.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.