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Finding the Fourth Proportional to 310,442.25, 428,410.71 and 176,306.25

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Solution

The fourth proportional to 310,442.25, 428,410.71 and 176,306.25 is: 243,302.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,442.25 : 428,410.71 = 176,306.25 : x
  2. Step 2: Convert to fraction form
    310,442.25/428,410.71 = 176,306.25/x
  3. Step 3: Cross multiply
    310,442.25x = 428,410.71 × 176,306.25
  4. Step 4: Simplify right side
    310,442.25x = 75,531,485,739.94
  5. Step 5: Solve for x
    x = 75,531,485,739.94/310,442.25
  6. Step 6: Final answer
    x = 243,302.86

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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.