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Finding the Fourth Proportional to 434,515.80, 651,773.70 and 420,000.60

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Solution

The fourth proportional to 434,515.80, 651,773.70 and 420,000.60 is: 630,000.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,515.80 : 651,773.70 = 420,000.60 : x
  2. Step 2: Convert to fraction form
    434,515.80/651,773.70 = 420,000.60/x
  3. Step 3: Cross multiply
    434,515.80x = 651,773.70 × 420,000.60
  4. Step 4: Simplify right side
    434,515.80x = 273,745,345,064.22
  5. Step 5: Solve for x
    x = 273,745,345,064.22/434,515.80
  6. Step 6: Final answer
    x = 630,000.90

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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.