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Finding the Fourth Proportional to 243,287.90, 364,892.22 and 85,479.51

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Solution

The fourth proportional to 243,287.90, 364,892.22 and 85,479.51 is: 128,205.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,287.90 : 364,892.22 = 85,479.51 : x
  2. Step 2: Convert to fraction form
    243,287.90/364,892.22 = 85,479.51/x
  3. Step 3: Cross multiply
    243,287.90x = 364,892.22 × 85,479.51
  4. Step 4: Simplify right side
    243,287.90x = 31,190,808,168.41
  5. Step 5: Solve for x
    x = 31,190,808,168.41/243,287.90
  6. Step 6: Final answer
    x = 128,205.34

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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.