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Finding the Fourth Proportional to 623.46, 929.90 and 612.53

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Solution

The fourth proportional to 623.46, 929.90 and 612.53 is: 913.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.46 : 929.90 = 612.53 : x
  2. Step 2: Convert to fraction form
    623.46/929.90 = 612.53/x
  3. Step 3: Cross multiply
    623.46x = 929.90 × 612.53
  4. Step 4: Simplify right side
    623.46x = 569,583.93
  5. Step 5: Solve for x
    x = 569,583.93/623.46
  6. Step 6: Final answer
    x = 913.59

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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.