Home / 420,390.15-580,150.74-229,415.86

Finding the Fourth Proportional to 420,390.15, 580,150.74 and 229,415.86

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Solution

The fourth proportional to 420,390.15, 580,150.74 and 229,415.86 is: 316,600.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,390.15 : 580,150.74 = 229,415.86 : x
  2. Step 2: Convert to fraction form
    420,390.15/580,150.74 = 229,415.86/x
  3. Step 3: Cross multiply
    420,390.15x = 580,150.74 × 229,415.86
  4. Step 4: Simplify right side
    420,390.15x = 133,095,780,946.74
  5. Step 5: Solve for x
    x = 133,095,780,946.74/420,390.15
  6. Step 6: Final answer
    x = 316,600.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.