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Finding the Fourth Proportional to 491,157.20, 736,735.80 and 280,816.40

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Solution

The fourth proportional to 491,157.20, 736,735.80 and 280,816.40 is: 421,224.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,157.20 : 736,735.80 = 280,816.40 : x
  2. Step 2: Convert to fraction form
    491,157.20/736,735.80 = 280,816.40/x
  3. Step 3: Cross multiply
    491,157.20x = 736,735.80 × 280,816.40
  4. Step 4: Simplify right side
    491,157.20x = 206,887,495,107.12
  5. Step 5: Solve for x
    x = 206,887,495,107.12/491,157.20
  6. Step 6: Final answer
    x = 421,224.60

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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.