Home / 669,326.61-1,003,990.28-420,183.57

Finding the Fourth Proportional to 669,326.61, 1,003,990.28 and 420,183.57

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Solution

The fourth proportional to 669,326.61, 1,003,990.28 and 420,183.57 is: 630,275.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    669,326.61 : 1,003,990.28 = 420,183.57 : x
  2. Step 2: Convert to fraction form
    669,326.61/1,003,990.28 = 420,183.57/x
  3. Step 3: Cross multiply
    669,326.61x = 1,003,990.28 × 420,183.57
  4. Step 4: Simplify right side
    669,326.61x = 421,860,220,095.70
  5. Step 5: Solve for x
    x = 421,860,220,095.70/669,326.61
  6. Step 6: Final answer
    x = 630,275.58

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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.