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Finding the Fourth Proportional to 429,307.90, 643,961.85 and 303,336.70

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Solution

The fourth proportional to 429,307.90, 643,961.85 and 303,336.70 is: 455,005.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,307.90 : 643,961.85 = 303,336.70 : x
  2. Step 2: Convert to fraction form
    429,307.90/643,961.85 = 303,336.70/x
  3. Step 3: Cross multiply
    429,307.90x = 643,961.85 × 303,336.70
  4. Step 4: Simplify right side
    429,307.90x = 195,337,262,504.90
  5. Step 5: Solve for x
    x = 195,337,262,504.90/429,307.90
  6. Step 6: Final answer
    x = 455,005.05

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Similar ratio
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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.