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Finding the Fourth Proportional to 623.70, 926.50 and 612.90

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Solution

The fourth proportional to 623.70, 926.50 and 612.90 is: 910.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.70 : 926.50 = 612.90 : x
  2. Step 2: Convert to fraction form
    623.70/926.50 = 612.90/x
  3. Step 3: Cross multiply
    623.70x = 926.50 × 612.90
  4. Step 4: Simplify right side
    623.70x = 567,851.85
  5. Step 5: Solve for x
    x = 567,851.85/623.70
  6. Step 6: Final answer
    x = 910.46

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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.