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Finding the Fourth Proportional to 311,887.71, 430,403.76 and 168,647.72

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Solution

The fourth proportional to 311,887.71, 430,403.76 and 168,647.72 is: 232,733.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,887.71 : 430,403.76 = 168,647.72 : x
  2. Step 2: Convert to fraction form
    311,887.71/430,403.76 = 168,647.72/x
  3. Step 3: Cross multiply
    311,887.71x = 430,403.76 × 168,647.72
  4. Step 4: Simplify right side
    311,887.71x = 72,586,610,651.41
  5. Step 5: Solve for x
    x = 72,586,610,651.41/311,887.71
  6. Step 6: Final answer
    x = 232,733.15

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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.