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Finding the Fourth Proportional to 655.49, 904.27 and 419.32

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Solution

The fourth proportional to 655.49, 904.27 and 419.32 is: 578.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    655.49 : 904.27 = 419.32 : x
  2. Step 2: Convert to fraction form
    655.49/904.27 = 419.32/x
  3. Step 3: Cross multiply
    655.49x = 904.27 × 419.32
  4. Step 4: Simplify right side
    655.49x = 379,178.50
  5. Step 5: Solve for x
    x = 379,178.50/655.49
  6. Step 6: Final answer
    x = 578.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.