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Finding the Fourth Proportional to 385,336.64, 531,413.28 and 330,871.79

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Solution

The fourth proportional to 385,336.64, 531,413.28 and 330,871.79 is: 456,301.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,336.64 : 531,413.28 = 330,871.79 : x
  2. Step 2: Convert to fraction form
    385,336.64/531,413.28 = 330,871.79/x
  3. Step 3: Cross multiply
    385,336.64x = 531,413.28 × 330,871.79
  4. Step 4: Simplify right side
    385,336.64x = 175,829,660,526.31
  5. Step 5: Solve for x
    x = 175,829,660,526.31/385,336.64
  6. Step 6: Final answer
    x = 456,301.44

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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.