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Finding the Fourth Proportional to 678,224.48, 936,032.64 and 391,744.24

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Solution

The fourth proportional to 678,224.48, 936,032.64 and 391,744.24 is: 540,654.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,224.48 : 936,032.64 = 391,744.24 : x
  2. Step 2: Convert to fraction form
    678,224.48/936,032.64 = 391,744.24/x
  3. Step 3: Cross multiply
    678,224.48x = 936,032.64 × 391,744.24
  4. Step 4: Simplify right side
    678,224.48x = 366,685,395,171.99
  5. Step 5: Solve for x
    x = 366,685,395,171.99/678,224.48
  6. Step 6: Final answer
    x = 540,654.91

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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.