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Finding the Fourth Proportional to 370,483.20, 511,228.80 and 209,325.60

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Solution

The fourth proportional to 370,483.20, 511,228.80 and 209,325.60 is: 288,847.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,483.20 : 511,228.80 = 209,325.60 : x
  2. Step 2: Convert to fraction form
    370,483.20/511,228.80 = 209,325.60/x
  3. Step 3: Cross multiply
    370,483.20x = 511,228.80 × 209,325.60
  4. Step 4: Simplify right side
    370,483.20x = 107,013,275,297.28
  5. Step 5: Solve for x
    x = 107,013,275,297.28/370,483.20
  6. Step 6: Final answer
    x = 288,847.85

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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.