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Finding the Fourth Proportional to 426,394.82, 639,926.48 and 297,472.71

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Solution

The fourth proportional to 426,394.82, 639,926.48 and 297,472.71 is: 446,442.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,394.82 : 639,926.48 = 297,472.71 : x
  2. Step 2: Convert to fraction form
    426,394.82/639,926.48 = 297,472.71/x
  3. Step 3: Cross multiply
    426,394.82x = 639,926.48 × 297,472.71
  4. Step 4: Simplify right side
    426,394.82x = 190,360,664,950.04
  5. Step 5: Solve for x
    x = 190,360,664,950.04/426,394.82
  6. Step 6: Final answer
    x = 446,442.25

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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.