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Finding the Fourth Proportional to 487,286.40, 669,870.24 and 419,053.44

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Solution

The fourth proportional to 487,286.40, 669,870.24 and 419,053.44 is: 576,070.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,286.40 : 669,870.24 = 419,053.44 : x
  2. Step 2: Convert to fraction form
    487,286.40/669,870.24 = 419,053.44/x
  3. Step 3: Cross multiply
    487,286.40x = 669,870.24 × 419,053.44
  4. Step 4: Simplify right side
    487,286.40x = 280,711,428,425.63
  5. Step 5: Solve for x
    x = 280,711,428,425.63/487,286.40
  6. Step 6: Final answer
    x = 576,070.72

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.