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Finding the Fourth Proportional to 310,066.71, 427,938.49 and 189,278.02

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Solution

The fourth proportional to 310,066.71, 427,938.49 and 189,278.02 is: 261,232.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,066.71 : 427,938.49 = 189,278.02 : x
  2. Step 2: Convert to fraction form
    310,066.71/427,938.49 = 189,278.02/x
  3. Step 3: Cross multiply
    310,066.71x = 427,938.49 × 189,278.02
  4. Step 4: Simplify right side
    310,066.71x = 80,999,348,433.36
  5. Step 5: Solve for x
    x = 80,999,348,433.36/310,066.71
  6. Step 6: Final answer
    x = 261,232.01

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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.