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Finding the Fourth Proportional to 312,633.02, 431,455.46 and 176,679.53

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Solution

The fourth proportional to 312,633.02, 431,455.46 and 176,679.53 is: 243,830.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,633.02 : 431,455.46 = 176,679.53 : x
  2. Step 2: Convert to fraction form
    312,633.02/431,455.46 = 176,679.53/x
  3. Step 3: Cross multiply
    312,633.02x = 431,455.46 × 176,679.53
  4. Step 4: Simplify right side
    312,633.02x = 76,229,347,459.84
  5. Step 5: Solve for x
    x = 76,229,347,459.84/312,633.02
  6. Step 6: Final answer
    x = 243,830.12

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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.