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Finding the Fourth Proportional to 644,453.78, 889,345.76 and 358,000.52

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Solution

The fourth proportional to 644,453.78, 889,345.76 and 358,000.52 is: 494,040.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,453.78 : 889,345.76 = 358,000.52 : x
  2. Step 2: Convert to fraction form
    644,453.78/889,345.76 = 358,000.52/x
  3. Step 3: Cross multiply
    644,453.78x = 889,345.76 × 358,000.52
  4. Step 4: Simplify right side
    644,453.78x = 318,386,244,539.80
  5. Step 5: Solve for x
    x = 318,386,244,539.80/644,453.78
  6. Step 6: Final answer
    x = 494,040.46

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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.