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Finding the Fourth Proportional to 459.74, 688.30 and 416.49

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Solution

The fourth proportional to 459.74, 688.30 and 416.49 is: 623.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    459.74 : 688.30 = 416.49 : x
  2. Step 2: Convert to fraction form
    459.74/688.30 = 416.49/x
  3. Step 3: Cross multiply
    459.74x = 688.30 × 416.49
  4. Step 4: Simplify right side
    459.74x = 286,670.07
  5. Step 5: Solve for x
    x = 286,670.07/459.74
  6. Step 6: Final answer
    x = 623.55

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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.