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Finding the Fourth Proportional to 644,784.48, 889,775.64 and 358,302

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Solution

The fourth proportional to 644,784.48, 889,775.64 and 358,302 is: 494,441.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,784.48 : 889,775.64 = 358,302 : x
  2. Step 2: Convert to fraction form
    644,784.48/889,775.64 = 358,302/x
  3. Step 3: Cross multiply
    644,784.48x = 889,775.64 × 358,302
  4. Step 4: Simplify right side
    644,784.48x = 318,808,391,363.28
  5. Step 5: Solve for x
    x = 318,808,391,363.28/644,784.48
  6. Step 6: Final answer
    x = 494,441.79

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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.