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Finding the Fourth Proportional to 361,639.20, 542,458.80 and 346,281.60

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Solution

The fourth proportional to 361,639.20, 542,458.80 and 346,281.60 is: 519,422.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,639.20 : 542,458.80 = 346,281.60 : x
  2. Step 2: Convert to fraction form
    361,639.20/542,458.80 = 346,281.60/x
  3. Step 3: Cross multiply
    361,639.20x = 542,458.80 × 346,281.60
  4. Step 4: Simplify right side
    361,639.20x = 187,843,501,198.08
  5. Step 5: Solve for x
    x = 187,843,501,198.08/361,639.20
  6. Step 6: Final answer
    x = 519,422.40

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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.