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Finding the Fourth Proportional to 420,639.01, 629,952.64 and 242,606.27

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Solution

The fourth proportional to 420,639.01, 629,952.64 and 242,606.27 is: 363,329.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,639.01 : 629,952.64 = 242,606.27 : x
  2. Step 2: Convert to fraction form
    420,639.01/629,952.64 = 242,606.27/x
  3. Step 3: Cross multiply
    420,639.01x = 629,952.64 × 242,606.27
  4. Step 4: Simplify right side
    420,639.01x = 152,830,461,235.42
  5. Step 5: Solve for x
    x = 152,830,461,235.42/420,639.01
  6. Step 6: Final answer
    x = 363,329.26

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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.