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Finding the Fourth Proportional to 625,653.90, 863,406.81 and 339,178.50

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Solution

The fourth proportional to 625,653.90, 863,406.81 and 339,178.50 is: 468,068.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,653.90 : 863,406.81 = 339,178.50 : x
  2. Step 2: Convert to fraction form
    625,653.90/863,406.81 = 339,178.50/x
  3. Step 3: Cross multiply
    625,653.90x = 863,406.81 × 339,178.50
  4. Step 4: Simplify right side
    625,653.90x = 292,849,026,705.59
  5. Step 5: Solve for x
    x = 292,849,026,705.59/625,653.90
  6. Step 6: Final answer
    x = 468,068.73

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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.