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Finding the Fourth Proportional to 571,967.40, 789,409.50 and 317,400.60

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Solution

The fourth proportional to 571,967.40, 789,409.50 and 317,400.60 is: 438,065.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,967.40 : 789,409.50 = 317,400.60 : x
  2. Step 2: Convert to fraction form
    571,967.40/789,409.50 = 317,400.60/x
  3. Step 3: Cross multiply
    571,967.40x = 789,409.50 × 317,400.60
  4. Step 4: Simplify right side
    571,967.40x = 250,559,048,945.70
  5. Step 5: Solve for x
    x = 250,559,048,945.70/571,967.40
  6. Step 6: Final answer
    x = 438,065.26

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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.