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Finding the Fourth Proportional to 310,420.16, 428,431.36 and 183,127.04

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Solution

The fourth proportional to 310,420.16, 428,431.36 and 183,127.04 is: 252,745.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,420.16 : 428,431.36 = 183,127.04 : x
  2. Step 2: Convert to fraction form
    310,420.16/428,431.36 = 183,127.04/x
  3. Step 3: Cross multiply
    310,420.16x = 428,431.36 × 183,127.04
  4. Step 4: Simplify right side
    310,420.16x = 78,457,366,799.97
  5. Step 5: Solve for x
    x = 78,457,366,799.97/310,420.16
  6. Step 6: Final answer
    x = 252,745.72

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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.