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Finding the Fourth Proportional to 651,722.77, 899,208.55 and 393,395.54

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Solution

The fourth proportional to 651,722.77, 899,208.55 and 393,395.54 is: 542,783.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,722.77 : 899,208.55 = 393,395.54 : x
  2. Step 2: Convert to fraction form
    651,722.77/899,208.55 = 393,395.54/x
  3. Step 3: Cross multiply
    651,722.77x = 899,208.55 × 393,395.54
  4. Step 4: Simplify right side
    651,722.77x = 353,744,633,099.87
  5. Step 5: Solve for x
    x = 353,744,633,099.87/651,722.77
  6. Step 6: Final answer
    x = 542,783.91

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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.