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Finding the Fourth Proportional to 428,388, 591,199.02 and 237,397.20

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Solution

The fourth proportional to 428,388, 591,199.02 and 237,397.20 is: 327,621.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,388 : 591,199.02 = 237,397.20 : x
  2. Step 2: Convert to fraction form
    428,388/591,199.02 = 237,397.20/x
  3. Step 3: Cross multiply
    428,388x = 591,199.02 × 237,397.20
  4. Step 4: Simplify right side
    428,388x = 140,348,991,990.74
  5. Step 5: Solve for x
    x = 140,348,991,990.74/428,388
  6. Step 6: Final answer
    x = 327,621.20

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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.