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Finding the Fourth Proportional to 644,359.32, 889,191.27 and 357,897.78

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Solution

The fourth proportional to 644,359.32, 889,191.27 and 357,897.78 is: 493,885.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,359.32 : 889,191.27 = 357,897.78 : x
  2. Step 2: Convert to fraction form
    644,359.32/889,191.27 = 357,897.78/x
  3. Step 3: Cross multiply
    644,359.32x = 889,191.27 × 357,897.78
  4. Step 4: Simplify right side
    644,359.32x = 318,239,581,528.38
  5. Step 5: Solve for x
    x = 318,239,581,528.38/644,359.32
  6. Step 6: Final answer
    x = 493,885.28

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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.