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Finding the Fourth Proportional to 434,525.80, 651,788.70 and 420,010.60

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Solution

The fourth proportional to 434,525.80, 651,788.70 and 420,010.60 is: 630,015.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,525.80 : 651,788.70 = 420,010.60 : x
  2. Step 2: Convert to fraction form
    434,525.80/651,788.70 = 420,010.60/x
  3. Step 3: Cross multiply
    434,525.80x = 651,788.70 × 420,010.60
  4. Step 4: Simplify right side
    434,525.80x = 273,758,162,960.22
  5. Step 5: Solve for x
    x = 273,758,162,960.22/434,525.80
  6. Step 6: Final answer
    x = 630,015.90

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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.