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Finding the Fourth Proportional to 644,910.60, 889,970.20 and 358,424.54

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Solution

The fourth proportional to 644,910.60, 889,970.20 and 358,424.54 is: 494,622.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,910.60 : 889,970.20 = 358,424.54 : x
  2. Step 2: Convert to fraction form
    644,910.60/889,970.20 = 358,424.54/x
  3. Step 3: Cross multiply
    644,910.60x = 889,970.20 × 358,424.54
  4. Step 4: Simplify right side
    644,910.60x = 318,987,159,548.71
  5. Step 5: Solve for x
    x = 318,987,159,548.71/644,910.60
  6. Step 6: Final answer
    x = 494,622.29

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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.