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Finding the Fourth Proportional to 578,629.80, 867,815.10 and 380,341.80

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Solution

The fourth proportional to 578,629.80, 867,815.10 and 380,341.80 is: 570,427.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,629.80 : 867,815.10 = 380,341.80 : x
  2. Step 2: Convert to fraction form
    578,629.80/867,815.10 = 380,341.80/x
  3. Step 3: Cross multiply
    578,629.80x = 867,815.10 × 380,341.80
  4. Step 4: Simplify right side
    578,629.80x = 330,066,357,201.18
  5. Step 5: Solve for x
    x = 330,066,357,201.18/578,629.80
  6. Step 6: Final answer
    x = 570,427.51

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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.