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Finding the Fourth Proportional to 315,245.64, 435,035.40 and 172,002.60

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Solution

The fourth proportional to 315,245.64, 435,035.40 and 172,002.60 is: 237,361.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,245.64 : 435,035.40 = 172,002.60 : x
  2. Step 2: Convert to fraction form
    315,245.64/435,035.40 = 172,002.60/x
  3. Step 3: Cross multiply
    315,245.64x = 435,035.40 × 172,002.60
  4. Step 4: Simplify right side
    315,245.64x = 74,827,219,892.04
  5. Step 5: Solve for x
    x = 74,827,219,892.04/315,245.64
  6. Step 6: Final answer
    x = 237,361.63

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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.