Home / 420,810.18-580,721.76-239,533.78

Finding the Fourth Proportional to 420,810.18, 580,721.76 and 239,533.78

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Solution

The fourth proportional to 420,810.18, 580,721.76 and 239,533.78 is: 330,558.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,810.18 : 580,721.76 = 239,533.78 : x
  2. Step 2: Convert to fraction form
    420,810.18/580,721.76 = 239,533.78/x
  3. Step 3: Cross multiply
    420,810.18x = 580,721.76 × 239,533.78
  4. Step 4: Simplify right side
    420,810.18x = 139,102,479,752.86
  5. Step 5: Solve for x
    x = 139,102,479,752.86/420,810.18
  6. Step 6: Final answer
    x = 330,558.73

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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.