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Finding the Fourth Proportional to 642,468.30, 886,605.39 and 356,006.94

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Solution

The fourth proportional to 642,468.30, 886,605.39 and 356,006.94 is: 491,289.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,468.30 : 886,605.39 = 356,006.94 : x
  2. Step 2: Convert to fraction form
    642,468.30/886,605.39 = 356,006.94/x
  3. Step 3: Cross multiply
    642,468.30x = 886,605.39 × 356,006.94
  4. Step 4: Simplify right side
    642,468.30x = 315,637,671,881.41
  5. Step 5: Solve for x
    x = 315,637,671,881.41/642,468.30
  6. Step 6: Final answer
    x = 491,289.10

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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.