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Finding the Fourth Proportional to 685,732.95, 946,321.49 and 395,339.54

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Solution

The fourth proportional to 685,732.95, 946,321.49 and 395,339.54 is: 545,574.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,732.95 : 946,321.49 = 395,339.54 : x
  2. Step 2: Convert to fraction form
    685,732.95/946,321.49 = 395,339.54/x
  3. Step 3: Cross multiply
    685,732.95x = 946,321.49 × 395,339.54
  4. Step 4: Simplify right side
    685,732.95x = 374,118,298,805.46
  5. Step 5: Solve for x
    x = 374,118,298,805.46/685,732.95
  6. Step 6: Final answer
    x = 545,574.34

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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.