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Finding the Fourth Proportional to 571,811, 789,600.80 and 357,317.60

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Solution

The fourth proportional to 571,811, 789,600.80 and 357,317.60 is: 493,411.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,811 : 789,600.80 = 357,317.60 : x
  2. Step 2: Convert to fraction form
    571,811/789,600.80 = 357,317.60/x
  3. Step 3: Cross multiply
    571,811x = 789,600.80 × 357,317.60
  4. Step 4: Simplify right side
    571,811x = 282,138,262,814.08
  5. Step 5: Solve for x
    x = 282,138,262,814.08/571,811
  6. Step 6: Final answer
    x = 493,411.74

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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.