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Finding the Fourth Proportional to 381,721.80, 572,582.70 and 335,065.80

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Solution

The fourth proportional to 381,721.80, 572,582.70 and 335,065.80 is: 502,598.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,721.80 : 572,582.70 = 335,065.80 : x
  2. Step 2: Convert to fraction form
    381,721.80/572,582.70 = 335,065.80/x
  3. Step 3: Cross multiply
    381,721.80x = 572,582.70 × 335,065.80
  4. Step 4: Simplify right side
    381,721.80x = 191,852,880,441.66
  5. Step 5: Solve for x
    x = 191,852,880,441.66/381,721.80
  6. Step 6: Final answer
    x = 502,598.70

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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.