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Finding the Fourth Proportional to 647,815.68, 893,966.40 and 361,329.30

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Solution

The fourth proportional to 647,815.68, 893,966.40 and 361,329.30 is: 498,623.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,815.68 : 893,966.40 = 361,329.30 : x
  2. Step 2: Convert to fraction form
    647,815.68/893,966.40 = 361,329.30/x
  3. Step 3: Cross multiply
    647,815.68x = 893,966.40 × 361,329.30
  4. Step 4: Simplify right side
    647,815.68x = 323,016,253,535.52
  5. Step 5: Solve for x
    x = 323,016,253,535.52/647,815.68
  6. Step 6: Final answer
    x = 498,623.70

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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.