Home / 381,828.40-572,742.60-319,620.40

Finding the Fourth Proportional to 381,828.40, 572,742.60 and 319,620.40

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Solution

The fourth proportional to 381,828.40, 572,742.60 and 319,620.40 is: 479,430.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,828.40 : 572,742.60 = 319,620.40 : x
  2. Step 2: Convert to fraction form
    381,828.40/572,742.60 = 319,620.40/x
  3. Step 3: Cross multiply
    381,828.40x = 572,742.60 × 319,620.40
  4. Step 4: Simplify right side
    381,828.40x = 183,060,218,909.04
  5. Step 5: Solve for x
    x = 183,060,218,909.04/381,828.40
  6. Step 6: Final answer
    x = 479,430.60

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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.