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Finding the Fourth Proportional to 310,318.72, 428,240.32 and 176,182.72

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Solution

The fourth proportional to 310,318.72, 428,240.32 and 176,182.72 is: 243,132.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,318.72 : 428,240.32 = 176,182.72 : x
  2. Step 2: Convert to fraction form
    310,318.72/428,240.32 = 176,182.72/x
  3. Step 3: Cross multiply
    310,318.72x = 428,240.32 × 176,182.72
  4. Step 4: Simplify right side
    310,318.72x = 75,448,544,391.27
  5. Step 5: Solve for x
    x = 75,448,544,391.27/310,318.72
  6. Step 6: Final answer
    x = 243,132.43

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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.