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Finding the Fourth Proportional to 310,385.06, 428,338.99 and 174,410.85

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Solution

The fourth proportional to 310,385.06, 428,338.99 and 174,410.85 is: 240,691.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,385.06 : 428,338.99 = 174,410.85 : x
  2. Step 2: Convert to fraction form
    310,385.06/428,338.99 = 174,410.85/x
  3. Step 3: Cross multiply
    310,385.06x = 428,338.99 × 174,410.85
  4. Step 4: Simplify right side
    310,385.06x = 74,706,967,334.04
  5. Step 5: Solve for x
    x = 74,706,967,334.04/310,385.06
  6. Step 6: Final answer
    x = 240,691.25

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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.