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Finding the Fourth Proportional to 700,622.80, 966,930.90 and 428,870.28

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Solution

The fourth proportional to 700,622.80, 966,930.90 and 428,870.28 is: 591,884.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    700,622.80 : 966,930.90 = 428,870.28 : x
  2. Step 2: Convert to fraction form
    700,622.80/966,930.90 = 428,870.28/x
  3. Step 3: Cross multiply
    700,622.80x = 966,930.90 × 428,870.28
  4. Step 4: Simplify right side
    700,622.80x = 414,687,924,751.48
  5. Step 5: Solve for x
    x = 414,687,924,751.48/700,622.80
  6. Step 6: Final answer
    x = 591,884.71

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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.