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Finding the Fourth Proportional to 641,712.33, 885,563.28 and 351,342.72

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Solution

The fourth proportional to 641,712.33, 885,563.28 and 351,342.72 is: 484,853.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,712.33 : 885,563.28 = 351,342.72 : x
  2. Step 2: Convert to fraction form
    641,712.33/885,563.28 = 351,342.72/x
  3. Step 3: Cross multiply
    641,712.33x = 885,563.28 × 351,342.72
  4. Step 4: Simplify right side
    641,712.33x = 311,136,211,527.32
  5. Step 5: Solve for x
    x = 311,136,211,527.32/641,712.33
  6. Step 6: Final answer
    x = 484,853.10

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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.