Home / 434,785.12-651,124.32-220,990.72

Finding the Fourth Proportional to 434,785.12, 651,124.32 and 220,990.72

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Solution

The fourth proportional to 434,785.12, 651,124.32 and 220,990.72 is: 330,950.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,785.12 : 651,124.32 = 220,990.72 : x
  2. Step 2: Convert to fraction form
    434,785.12/651,124.32 = 220,990.72/x
  3. Step 3: Cross multiply
    434,785.12x = 651,124.32 × 220,990.72
  4. Step 4: Simplify right side
    434,785.12x = 143,892,432,286.31
  5. Step 5: Solve for x
    x = 143,892,432,286.31/434,785.12
  6. Step 6: Final answer
    x = 330,950.68

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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.