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Finding the Fourth Proportional to 867,394.40, 1,300,216.80 and 394,419.20

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Solution

The fourth proportional to 867,394.40, 1,300,216.80 and 394,419.20 is: 591,231.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    867,394.40 : 1,300,216.80 = 394,419.20 : x
  2. Step 2: Convert to fraction form
    867,394.40/1,300,216.80 = 394,419.20/x
  3. Step 3: Cross multiply
    867,394.40x = 1,300,216.80 × 394,419.20
  4. Step 4: Simplify right side
    867,394.40x = 512,830,470,082.56
  5. Step 5: Solve for x
    x = 512,830,470,082.56/867,394.40
  6. Step 6: Final answer
    x = 591,231.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.