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Finding the Fourth Proportional to 310,391.24, 428,339.48 and 181,418.40

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Solution

The fourth proportional to 310,391.24, 428,339.48 and 181,418.40 is: 250,357.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,391.24 : 428,339.48 = 181,418.40 : x
  2. Step 2: Convert to fraction form
    310,391.24/428,339.48 = 181,418.40/x
  3. Step 3: Cross multiply
    310,391.24x = 428,339.48 × 181,418.40
  4. Step 4: Simplify right side
    310,391.24x = 77,708,662,211.34
  5. Step 5: Solve for x
    x = 77,708,662,211.34/310,391.24
  6. Step 6: Final answer
    x = 250,357.14

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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.