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Finding the Fourth Proportional to 918,658.68, 1,267,805.94 and 510,763.80

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Solution

The fourth proportional to 918,658.68, 1,267,805.94 and 510,763.80 is: 704,885.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,658.68 : 1,267,805.94 = 510,763.80 : x
  2. Step 2: Convert to fraction form
    918,658.68/1,267,805.94 = 510,763.80/x
  3. Step 3: Cross multiply
    918,658.68x = 1,267,805.94 × 510,763.80
  4. Step 4: Simplify right side
    918,658.68x = 647,549,379,576.97
  5. Step 5: Solve for x
    x = 647,549,379,576.97/918,658.68
  6. Step 6: Final answer
    x = 704,885.71

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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.