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Finding the Fourth Proportional to 565,739.20, 780,608.28 and 317,389.42

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Solution

The fourth proportional to 565,739.20, 780,608.28 and 317,389.42 is: 437,934.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    565,739.20 : 780,608.28 = 317,389.42 : x
  2. Step 2: Convert to fraction form
    565,739.20/780,608.28 = 317,389.42/x
  3. Step 3: Cross multiply
    565,739.20x = 780,608.28 × 317,389.42
  4. Step 4: Simplify right side
    565,739.20x = 247,756,809,236.40
  5. Step 5: Solve for x
    x = 247,756,809,236.40/565,739.20
  6. Step 6: Final answer
    x = 437,934.67

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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.