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Finding the Fourth Proportional to 420,337.30, 629,813.40 and 242,534.20

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Solution

The fourth proportional to 420,337.30, 629,813.40 and 242,534.20 is: 363,401.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,337.30 : 629,813.40 = 242,534.20 : x
  2. Step 2: Convert to fraction form
    420,337.30/629,813.40 = 242,534.20/x
  3. Step 3: Cross multiply
    420,337.30x = 629,813.40 × 242,534.20
  4. Step 4: Simplify right side
    420,337.30x = 152,751,289,118.28
  5. Step 5: Solve for x
    x = 152,751,289,118.28/420,337.30
  6. Step 6: Final answer
    x = 363,401.70

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1.5x scale

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.