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Finding the Fourth Proportional to 685,767.50, 946,368.92 and 395,373.31

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Solution

The fourth proportional to 685,767.50, 946,368.92 and 395,373.31 is: 545,620.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,767.50 : 946,368.92 = 395,373.31 : x
  2. Step 2: Convert to fraction form
    685,767.50/946,368.92 = 395,373.31/x
  3. Step 3: Cross multiply
    685,767.50x = 946,368.92 × 395,373.31
  4. Step 4: Simplify right side
    685,767.50x = 374,169,011,441.72
  5. Step 5: Solve for x
    x = 374,169,011,441.72/685,767.50
  6. Step 6: Final answer
    x = 545,620.80

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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.