Home / 420,675.75-580,532.21-229,689.12

Finding the Fourth Proportional to 420,675.75, 580,532.21 and 229,689.12

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Solution

The fourth proportional to 420,675.75, 580,532.21 and 229,689.12 is: 316,970.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,675.75 : 580,532.21 = 229,689.12 : x
  2. Step 2: Convert to fraction form
    420,675.75/580,532.21 = 229,689.12/x
  3. Step 3: Cross multiply
    420,675.75x = 580,532.21 × 229,689.12
  4. Step 4: Simplify right side
    420,675.75x = 133,341,931,298.11
  5. Step 5: Solve for x
    x = 133,341,931,298.11/420,675.75
  6. Step 6: Final answer
    x = 316,970.81

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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.