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Finding the Fourth Proportional to 678,309.84, 936,071.28 and 423,808.56

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Solution

The fourth proportional to 678,309.84, 936,071.28 and 423,808.56 is: 584,858.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,309.84 : 936,071.28 = 423,808.56 : x
  2. Step 2: Convert to fraction form
    678,309.84/936,071.28 = 423,808.56/x
  3. Step 3: Cross multiply
    678,309.84x = 936,071.28 × 423,808.56
  4. Step 4: Simplify right side
    678,309.84x = 396,715,021,234.16
  5. Step 5: Solve for x
    x = 396,715,021,234.16/678,309.84
  6. Step 6: Final answer
    x = 584,858.13

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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.