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Finding the Fourth Proportional to 641,690.05, 963,481.28 and 357,935

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Solution

The fourth proportional to 641,690.05, 963,481.28 and 357,935 is: 537,430.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,690.05 : 963,481.28 = 357,935 : x
  2. Step 2: Convert to fraction form
    641,690.05/963,481.28 = 357,935/x
  3. Step 3: Cross multiply
    641,690.05x = 963,481.28 × 357,935
  4. Step 4: Simplify right side
    641,690.05x = 344,863,671,956.80
  5. Step 5: Solve for x
    x = 344,863,671,956.80/641,690.05
  6. Step 6: Final answer
    x = 537,430.29

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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.