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Finding the Fourth Proportional to 507.51, 699.72 and 419.34

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Solution

The fourth proportional to 507.51, 699.72 and 419.34 is: 578.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.51 : 699.72 = 419.34 : x
  2. Step 2: Convert to fraction form
    507.51/699.72 = 419.34/x
  3. Step 3: Cross multiply
    507.51x = 699.72 × 419.34
  4. Step 4: Simplify right side
    507.51x = 293,420.58
  5. Step 5: Solve for x
    x = 293,420.58/507.51
  6. Step 6: Final answer
    x = 578.16

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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.