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Finding the Fourth Proportional to 644,592.78, 889,537.68 and 358,139.52

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Solution

The fourth proportional to 644,592.78, 889,537.68 and 358,139.52 is: 494,232.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,592.78 : 889,537.68 = 358,139.52 : x
  2. Step 2: Convert to fraction form
    644,592.78/889,537.68 = 358,139.52/x
  3. Step 3: Cross multiply
    644,592.78x = 889,537.68 × 358,139.52
  4. Step 4: Simplify right side
    644,592.78x = 318,578,597,737.11
  5. Step 5: Solve for x
    x = 318,578,597,737.11/644,592.78
  6. Step 6: Final answer
    x = 494,232.34

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1.5x scale

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.