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Finding the Fourth Proportional to 431,688.90, 647,533.35 and 136,200.90

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Solution

The fourth proportional to 431,688.90, 647,533.35 and 136,200.90 is: 204,301.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,688.90 : 647,533.35 = 136,200.90 : x
  2. Step 2: Convert to fraction form
    431,688.90/647,533.35 = 136,200.90/x
  3. Step 3: Cross multiply
    431,688.90x = 647,533.35 × 136,200.90
  4. Step 4: Simplify right side
    431,688.90x = 88,194,625,050.02
  5. Step 5: Solve for x
    x = 88,194,625,050.02/431,688.90
  6. Step 6: Final answer
    x = 204,301.35

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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.