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Finding the Fourth Proportional to 644,307.08, 889,119.30 and 357,845.54

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Solution

The fourth proportional to 644,307.08, 889,119.30 and 357,845.54 is: 493,813.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,307.08 : 889,119.30 = 357,845.54 : x
  2. Step 2: Convert to fraction form
    644,307.08/889,119.30 = 357,845.54/x
  3. Step 3: Cross multiply
    644,307.08x = 889,119.30 × 357,845.54
  4. Step 4: Simplify right side
    644,307.08x = 318,167,376,032.92
  5. Step 5: Solve for x
    x = 318,167,376,032.92/644,307.08
  6. Step 6: Final answer
    x = 493,813.25

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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.