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Finding the Fourth Proportional to 420.69, 577.44 and 373.02

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Solution

The fourth proportional to 420.69, 577.44 and 373.02 is: 512.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    420.69 : 577.44 = 373.02 : x
  2. Step 2: Convert to fraction form
    420.69/577.44 = 373.02/x
  3. Step 3: Cross multiply
    420.69x = 577.44 × 373.02
  4. Step 4: Simplify right side
    420.69x = 215,396.67
  5. Step 5: Solve for x
    x = 215,396.67/420.69
  6. Step 6: Final answer
    x = 512.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.