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Finding the Fourth Proportional to 641,689.86, 963,481 and 357,934.80

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Solution

The fourth proportional to 641,689.86, 963,481 and 357,934.80 is: 537,430.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,689.86 : 963,481 = 357,934.80 : x
  2. Step 2: Convert to fraction form
    641,689.86/963,481 = 357,934.80/x
  3. Step 3: Cross multiply
    641,689.86x = 963,481 × 357,934.80
  4. Step 4: Simplify right side
    641,689.86x = 344,863,379,038.80
  5. Step 5: Solve for x
    x = 344,863,379,038.80/641,689.86
  6. Step 6: Final answer
    x = 537,430.00

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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.