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Finding the Fourth Proportional to 716,797.27, 989,180.33 and 390,111.51

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Solution

The fourth proportional to 716,797.27, 989,180.33 and 390,111.51 is: 538,353.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,797.27 : 989,180.33 = 390,111.51 : x
  2. Step 2: Convert to fraction form
    716,797.27/989,180.33 = 390,111.51/x
  3. Step 3: Cross multiply
    716,797.27x = 989,180.33 × 390,111.51
  4. Step 4: Simplify right side
    716,797.27x = 385,890,632,198.60
  5. Step 5: Solve for x
    x = 385,890,632,198.60/716,797.27
  6. Step 6: Final answer
    x = 538,353.94

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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.