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Finding the Fourth Proportional to 578,626.30, 867,809.85 and 380,338.30

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Solution

The fourth proportional to 578,626.30, 867,809.85 and 380,338.30 is: 570,422.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,626.30 : 867,809.85 = 380,338.30 : x
  2. Step 2: Convert to fraction form
    578,626.30/867,809.85 = 380,338.30/x
  3. Step 3: Cross multiply
    578,626.30x = 867,809.85 × 380,338.30
  4. Step 4: Simplify right side
    578,626.30x = 330,061,323,072.26
  5. Step 5: Solve for x
    x = 330,061,323,072.26/578,626.30
  6. Step 6: Final answer
    x = 570,422.26

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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.