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Finding the Fourth Proportional to 579,215.30, 869,600.55 and 369,781.70

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Solution

The fourth proportional to 579,215.30, 869,600.55 and 369,781.70 is: 555,168.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,215.30 : 869,600.55 = 369,781.70 : x
  2. Step 2: Convert to fraction form
    579,215.30/869,600.55 = 369,781.70/x
  3. Step 3: Cross multiply
    579,215.30x = 869,600.55 × 369,781.70
  4. Step 4: Simplify right side
    579,215.30x = 321,562,369,699.94
  5. Step 5: Solve for x
    x = 321,562,369,699.94/579,215.30
  6. Step 6: Final answer
    x = 555,168.98

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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.