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Finding the Fourth Proportional to 713,990.67, 1,069,528.01 and 398,615.55

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Solution

The fourth proportional to 713,990.67, 1,069,528.01 and 398,615.55 is: 597,109.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,990.67 : 1,069,528.01 = 398,615.55 : x
  2. Step 2: Convert to fraction form
    713,990.67/1,069,528.01 = 398,615.55/x
  3. Step 3: Cross multiply
    713,990.67x = 1,069,528.01 × 398,615.55
  4. Step 4: Simplify right side
    713,990.67x = 426,330,493,953.48
  5. Step 5: Solve for x
    x = 426,330,493,953.48/713,990.67
  6. Step 6: Final answer
    x = 597,109.33

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.