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Finding the Fourth Proportional to 389,123.99, 536,786.85 and 316,607.95

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Solution

The fourth proportional to 389,123.99, 536,786.85 and 316,607.95 is: 436,752.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,123.99 : 536,786.85 = 316,607.95 : x
  2. Step 2: Convert to fraction form
    389,123.99/536,786.85 = 316,607.95/x
  3. Step 3: Cross multiply
    389,123.99x = 536,786.85 × 316,607.95
  4. Step 4: Simplify right side
    389,123.99x = 169,950,984,165.46
  5. Step 5: Solve for x
    x = 169,950,984,165.46/389,123.99
  6. Step 6: Final answer
    x = 436,752.78

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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.