Home / 420,360.20-580,111.08-229,384.07

Finding the Fourth Proportional to 420,360.20, 580,111.08 and 229,384.07

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Solution

The fourth proportional to 420,360.20, 580,111.08 and 229,384.07 is: 316,557.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,360.20 : 580,111.08 = 229,384.07 : x
  2. Step 2: Convert to fraction form
    420,360.20/580,111.08 = 229,384.07/x
  3. Step 3: Cross multiply
    420,360.20x = 580,111.08 × 229,384.07
  4. Step 4: Simplify right side
    420,360.20x = 133,068,240,582.50
  5. Step 5: Solve for x
    x = 133,068,240,582.50/420,360.20
  6. Step 6: Final answer
    x = 316,557.66

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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.