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Finding the Fourth Proportional to 429,455.40, 644,183.10 and 425,518.80

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Solution

The fourth proportional to 429,455.40, 644,183.10 and 425,518.80 is: 638,278.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,455.40 : 644,183.10 = 425,518.80 : x
  2. Step 2: Convert to fraction form
    429,455.40/644,183.10 = 425,518.80/x
  3. Step 3: Cross multiply
    429,455.40x = 644,183.10 × 425,518.80
  4. Step 4: Simplify right side
    429,455.40x = 274,112,019,692.28
  5. Step 5: Solve for x
    x = 274,112,019,692.28/429,455.40
  6. Step 6: Final answer
    x = 638,278.20

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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.